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  <front>
    <journal-meta>
      <journal-id journal-id-type="publisher-id">abc</journal-id>
      <journal-title-group>
        <journal-title>Arquivos Brasileiros de Cardiologia</journal-title>
        <abbrev-journal-title abbrev-type="publisher">Arq. Bras. Cardiol.</abbrev-journal-title>
      </journal-title-group>
      <issn pub-type="ppub">0066-782X</issn>
      <issn pub-type="epub">1678-4170</issn>
      <publisher>
        <publisher-name>Sociedade Brasileira de Cardiologia - SBC</publisher-name>
        <publisher-loc>S&#227;o Paulo, SP, Brazil</publisher-loc>
      </publisher>
    </journal-meta>
    <article-meta>
      <article-id pub-id-type="publisher-id" specific-use="scielo-v3">yTZZrnnGMmBRgZmjMkZSDBz</article-id>
      <article-id pub-id-type="other">00006</article-id>
      <article-id pub-id-type="publisher-id" specific-use="scielo-v2">S0066-782X2009000800006</article-id>
      <article-id pub-id-type="publisher-id" specific-use="scielo-v1">S0066-782X(09)09300206</article-id>
      <article-id pub-id-type="doi">10.1590/S0066-782X2009000800006</article-id>
      <article-categories>
        <subj-group subj-group-type="heading">
          <subject>Artigos Originais</subject>
        </subj-group>
      </article-categories>
      <title-group>
        <article-title>Maior letalidade e morbidade por infarto agudo do mioc&#225;rdio em hospital p&#250;blico, em Feira de Santana - Bahia</article-title>
      </title-group>
      <contrib-group>
        <contrib contrib-type="author">
          <name>
            <surname>Ferreira</surname>
            <given-names>Gra&#231;a Maria Tavares de Melo</given-names>
          </name>
          <xref ref-type="aff" rid="aff01"/>
          <xref ref-type="aff" rid="aff02"/>
        </contrib>
        <contrib contrib-type="author">
          <name>
            <surname>Correia</surname>
            <given-names>Luis Cl&#225;udio</given-names>
          </name>
          <xref ref-type="aff" rid="aff01"/>
          <xref ref-type="aff" rid="aff02"/>
        </contrib>
        <contrib contrib-type="author">
          <name>
            <surname>Reis</surname>
            <given-names>Helena</given-names>
          </name>
          <xref ref-type="aff" rid="aff01"/>
          <xref ref-type="aff" rid="aff02"/>
        </contrib>
        <contrib contrib-type="author">
          <name>
            <surname>Ferreira Filho</surname>
            <given-names>Carlos Brand&#227;o</given-names>
          </name>
          <xref ref-type="aff" rid="aff01"/>
          <xref ref-type="aff" rid="aff02"/>
        </contrib>
        <contrib contrib-type="author">
          <name>
            <surname>Freitas</surname>
            <given-names>Francisco</given-names>
          </name>
          <xref ref-type="aff" rid="aff01"/>
          <xref ref-type="aff" rid="aff02"/>
        </contrib>
        <contrib contrib-type="author">
          <name>
            <surname>Ferreira</surname>
            <given-names>Guilherme Melo</given-names>
          </name>
          <xref ref-type="aff" rid="aff01"/>
          <xref ref-type="aff" rid="aff02"/>
        </contrib>
        <contrib contrib-type="author">
          <name>
            <surname>J&#250;nior</surname>
            <given-names>Ivan</given-names>
          </name>
          <xref ref-type="aff" rid="aff01"/>
          <xref ref-type="aff" rid="aff02"/>
        </contrib>
        <contrib contrib-type="author">
          <name>
            <surname>Oliveira</surname>
            <given-names>Nelson</given-names>
          </name>
          <xref ref-type="aff" rid="aff01"/>
          <xref ref-type="aff" rid="aff02"/>
        </contrib>
        <contrib contrib-type="author">
          <name>
            <surname>Guimar&#227;es</surname>
            <given-names>Arm&#234;nio Costa</given-names>
          </name>
          <xref ref-type="aff" rid="aff01"/>
          <xref ref-type="aff" rid="aff02"/>
        </contrib>
      </contrib-group>
      <aff id="aff01">
        <addr-line>
          <named-content content-type="state"/>
        </addr-line>
        <institution content-type="orgname">Escola Bahiana de Medicina e Sa&#250;de P&#250;blica</institution>
        <country country="BR">Brazil</country>
      </aff>
      <aff id="aff02">
        <addr-line>
          <named-content content-type="city">Salvador</named-content>
          <named-content content-type="state"/>
        </addr-line>
        <institution content-type="orgname">Escola Bahiana de Medicina e Sa&#250;de P&#250;blica</institution>
        <country country="BR">Brazil</country>
      </aff>
      <pub-date date-type="collection" publication-format="electronic">
        <month>08</month>
        <year>2009</year>
      </pub-date>
      <volume>93</volume>
      <issue>2</issue>
      <fpage>97</fpage>
      <lpage>104</lpage>
      <history>
        <date date-type="accepted">
          <day>26</day>
          <month>09</month>
          <year>2008</year>
        </date>
        <date date-type="rev-recd">
          <day>28</day>
          <month>07</month>
          <year>2008</year>
        </date>
        <date date-type="received">
          <day>30</day>
          <month>04</month>
          <year>2008</year>
        </date>
      </history>
      <permissions>
        <license license-type="open-access" xlink:href="http://creativecommons.org/licenses/by-nc/4.0/" xml:lang="en">
          <license-p>This work is licensed under a Creative Commons Attribution-NonCommercial 4.0 International License.</license-p>
        </license>
      </permissions>
      <abstract>
        <p>FUNDAMENTO: Fatores relacionados ao n&#237;vel s&#243;cio-econ&#244;mico, &#224; qualidade e &#224; gest&#227;o assistencial podem influenciar na letalidade e morbidade por infarto agudo do mioc&#225;rdio (IAM). OBJETIVO: Comparar letalidade e morbidade por IAM entre hospital p&#250;blico e privado. M&#201;TODOS: Estudo observacional, com grupos de compara&#231;&#227;o. Avalia&#231;&#227;o cl&#237;nica na admiss&#227;o e registro de dados diagn&#243;sticos, terap&#234;uticos e evolutivos at&#233; a alta ou o &#243;bito. Compara&#231;&#227;o das caracter&#237;sticas cl&#237;nicas por an&#225;lise univariada seguida de an&#225;lise bivariada, avaliando a associa&#231;&#227;o de preditores com &#243;bito e morbidade (Killip &gt;I), SPSS, vers&#227;o 13,0. RESULTADOS: Avaliados 150 pacientes, 63 (42,0%) privados e 87 (58,0%) p&#250;blicos, com 63,1% e 62,1% de homens e idades de 61,1&#177;13,8 e 60,0&#177;11,6 anos, respectivamente. A letalidade por IAM foi de 19,5% nos p&#250;blicos vs 4,8% nos privados (p=0,001) e a morbidade (Killip classe &gt;1) de 34,3% nos p&#250;blicos vs 15,0% nos privados (p=0,012). Houve diferen&#231;a significativa nos p&#250;blicos devido &#224; menor renda familiar e escolaridade (70,1% com um a dois sal&#225;rios vs 19,0%, p&lt;0,001, e 49,4% de analfabetos vs 6,3%, p&lt;0,001, respectivamente), maior tempo de chegada ao hospital (TDH&gt;1 hora: 76,9% vs 48,6%; p=0,003) e maior tempo para ser medicado (THM&gt;15 minutos: 47,1% vs 8,0%, p&lt;0,001), UTI para 8% vs 94% nos privados e tromb&#243;lise para 20,6% vs 54,0%, respectivamente (p&lt;0,001). CONCLUS&#195;O: Letalidade e morbidade maior no paciente p&#250;blico, que se apresentou mais grave, mais tardiamente e recebeu tratamento de menor qualidade.</p>
      </abstract>
      <kwd-group xml:lang="pt" kwd-group-type="author-generated">
        <kwd>Letalidade</kwd>
        <kwd>morbidade</kwd>
        <kwd>infarto do mioc&#225;rdio</kwd>
        <kwd>desigualdades em sa&#250;de</kwd>
        <kwd>pol&#237;tica de sa&#250;de</kwd>
      </kwd-group>
      <pub-date publication-format="electronic" date-type="pub">
        <day>13</day>
        <month>10</month>
        <year>2009</year>
      </pub-date>
    </article-meta>
  </front>
  <body>
    <p>ARTIGO ORIGINAL </p>
    <p> CORONARIOPATIA AGUDA</p>
    <p>Maior letalidade e morbidade por infarto agudo do mioc&#225;rdio em hospital p&#250;blico, em Feira de Santana - Bahia</p>
    <p>
      <bold>Gra&#231;a Maria Tavares de Melo Ferreira; Luis Cl&#225;udio Correia; Helena Reis; Carlos Brand&#227;o Ferreira Filho; Francisco Freitas; Guilherme Melo Ferreira; Ivan J&#250;nior; Nelson Oliveira; Arm&#234;nio Costa Guimar&#227;es</bold>
    </p>
    <p>Escola Bahiana de Medicina e Sa&#250;de P&#250;blica (EBMSP) - Funda&#231;&#227;o Bahiana para o Desenvolvimento das Ci&#234;ncias (FBDC), Salvador, BA, Brasil</p>
    <p>
      <xref ref-type="corresp" rid="nt02">Correspond&#234;ncia</xref>
    </p>
    <p>
      <bold>RESUMO</bold>
    </p>
    <p><bold>FUNDAMENTO:</bold> Fatores relacionados ao n&#237;vel s&#243;cio-econ&#244;mico, &#224; qualidade e &#224; gest&#227;o assistencial podem influenciar na letalidade e morbidade por infarto agudo do mioc&#225;rdio (IAM). </p>
    <p><bold>OBJETIVO:</bold> Comparar letalidade e morbidade por IAM entre hospital p&#250;blico e privado. </p>
    <p><bold>M&#201;TODOS:</bold> Estudo observacional, com grupos de compara&#231;&#227;o. Avalia&#231;&#227;o cl&#237;nica na admiss&#227;o e registro de dados diagn&#243;sticos, terap&#234;uticos e evolutivos at&#233; a alta ou o &#243;bito. Compara&#231;&#227;o das caracter&#237;sticas cl&#237;nicas por an&#225;lise univariada seguida de an&#225;lise bivariada, avaliando a associa&#231;&#227;o de preditores com &#243;bito e morbidade (Killip &gt;I), SPSS, vers&#227;o 13,0. </p>
    <p><bold>RESULTADOS:</bold> Avaliados 150 pacientes, 63 (42,0%) privados e 87 (58,0%) p&#250;blicos, com 63,1% e 62,1% de homens e idades de 61,1&#177;13,8 e 60,0&#177;11,6 anos, respectivamente. A letalidade por IAM foi de 19,5% nos p&#250;blicos vs 4,8% nos privados (p=0,001) e a morbidade (Killip classe &gt;1) de 34,3% nos p&#250;blicos vs 15,0% nos privados (p=0,012). Houve diferen&#231;a significativa nos p&#250;blicos devido &#224; menor renda familiar e escolaridade (70,1% com um a dois sal&#225;rios vs 19,0%, p&lt;0,001, e 49,4% de analfabetos vs 6,3%, p&lt;0,001, respectivamente), maior tempo de chegada ao hospital (TDH&gt;1 hora: 76,9% vs 48,6%; p=0,003) e maior tempo para ser medicado (THM<underline>&gt;</underline>15 minutos: 47,1% vs 8,0%, p&lt;0,001), UTI para 8% vs 94% nos privados e tromb&#243;lise para 20,6% vs 54,0%, respectivamente (p&lt;0,001). </p>
    <p><bold>CONCLUS&#195;O:</bold> Letalidade e morbidade maior no paciente p&#250;blico, que se apresentou mais grave, mais tardiamente e recebeu tratamento de menor qualidade.</p>
    <p><bold>Palavras chave:</bold> Letalidade, morbidade, infarto do mioc&#225;rdio, desigualdades em sa&#250;de, pol&#237;tica de sa&#250;de.</p>
    <p>
      <bold>Introdu&#231;&#227;o</bold>
    </p>
    <p>O infarto agudo do mioc&#225;rdio (IAM) &#233; a principal complica&#231;&#227;o da DAC<sup>1</sup>(doen&#231;a arterial coronariana). A letalidade e morbidade por IAM dependem de fatores relacionados &#224; gravidade da doen&#231;a e da presteza e qualidade da assist&#234;ncia hospitalar. Uma vez que o paciente receba o cuidado hospitalar adequado nas primeiras horas, a letalidade mundial fica em torno de 10%<sup>2</sup>, pr&#243;xima &#224; observada em hospitais dos Munic&#237;pios do Rio de Janeiro (10,8%) e Niter&#243;i (12,3%)<sup>3,4</sup>. Todavia, esse percentual pode n&#227;o refletir a realidade, no momento em que estejam presentes fatores como retardo entre o in&#237;cio da dor e a chegada ao hospital, retardo no in&#237;cio do tratamento intra-hospitalar, limita&#231;&#245;es no emprego de medidas de prote&#231;&#227;o mioc&#225;rdica, como o uso de trombol&#237;ticos e de angioplastia prim&#225;ria, e acesso &#224; unidade de cuidado intensivo<sup>2,5</sup>. Al&#233;m disso, os estratos sociais de menor renda e escolaridade apresentam hist&#243;ria natural da DAC mais grave, com possibilidade de maior letalidade e morbidade nos primeiros 28 dias p&#243;s-IAM<sup>6,7</sup>. Embora as raz&#245;es para tal n&#227;o estejam bem definidas, &#233; importante registrar que as unidades assistenciais de sa&#250;de p&#250;blica, sejam hospitais sejam postos de sa&#250;de, nem sempre contam com pessoal especializado para atendimentos de urg&#234;ncia e emerg&#234;ncia cardiovascular, bem como ocorre "falta" de determinados medicamentos, a exemplo de trombol&#237;ticos, e n&#250;mero insuficiente de leitos de UTI para atender &#224; demanda local, condi&#231;&#245;es que t&#234;m importante influ&#234;ncia sobre o progn&#243;stico da doen&#231;a. Outros fatores, como dificuldades de acesso a uma assist&#234;ncia ambulatorial e hospitalar especializada de melhor qualidade e limita&#231;&#245;es para a manuten&#231;&#227;o de medidas preventivas adequadas, de tipo prim&#225;rio ou secund&#225;rio, t&#234;m sido consideradas<sup>5-7</sup>. </p>
    <p>Na Bahia, a rede p&#250;blica de atendimento cardiovascular de alta complexidade apresenta s&#233;rias restri&#231;&#245;es, merecendo um estudo nesse sentido com vistas a uma reformula&#231;&#227;o do sistema. A cidade de Feira de Santana - 600 mil habitantes, maior cidade do interior do Estado da Bahia -, disp&#245;e de um hospital p&#250;blico e tr&#234;s hospitais privados. &#218;nicos a possu&#237;rem estrutura para cuidados intensivos, &#233; nessses hospitais onde se concentra o atendimento cardiol&#243;gico, criando condi&#231;&#245;es favor&#225;veis ao estudo dessa quest&#227;o. Assim, tanto o conhecimento sobre letalidade e morbidade na fase hospitalar do IAM e o perfil de risco coronariano de pacientes p&#250;blicos e privados, quanto a qualidade da assist&#234;ncia, podem criar nessa cidade, um subs&#237;dio importante para a corre&#231;&#227;o dessas graves distor&#231;&#245;es assistenciais.</p>
    <p>Este estudo tem por objetivo comparar a letalidade e a morbidade por IAM no hospital p&#250;blico em rela&#231;&#227;o &#224; rede privada, identificando os principais fatores relacionados &#224;s suas diversidades. </p>
    <p>
      <bold>M&#233;todos</bold>
    </p>
    <p>Estudo observacional, com grupos de compara&#231;&#227;o. Foram inclu&#237;dos pacientes maiores de 18 anos, com diagn&#243;stico confirmado de IAM, com base no tipo e dura&#231;&#227;o da dor e altera&#231;&#245;es eletrocardiogr&#225;ficas e enzim&#225;ticas, segundo os crit&#233;rios da III Diretriz sobre Tratamento do Infarto Agudo do Mioc&#225;rdio<sup>8</sup>, e que assinaram o TCLE. Foram exclu&#237;dos pacientes que n&#227;o tiveram condi&#231;&#245;es de responder ao question&#225;rio nem de serem examinados e observados adequadamente ou que n&#227;o aceitaram participar do estudo.</p>
    <p>Os pacientes da rede p&#250;blica foram representados pelos admitidos no Hospital Geral Cl&#233;riston Andrade, com 200 leitos, sendo 60 na Emerg&#234;ncia e 10 na UTI; e os pacientes da rede privada pelos admitidos nos hospitais EMEC, com 67 leitos, seis na UTI, S&#227;o Matheus, com 53 leitos, seis na UTI, e UNIMED, com 64 leitos, oito na UTI.</p>
    <p>Os pacientes foram submetidos a exame cl&#237;nico na admiss&#227;o e responderam tamb&#233;m a um question&#225;rio sobre dados demogr&#225;ficos, fatores de risco, bem como tempo entre o in&#237;cio da dor e a chegada ao hospital (tempo dor-hospital [TDH]) e entre a chegada ao hospital e o uso de qualquer medica&#231;&#227;o espec&#237;fica (tempo hospital-medica&#231;&#227;o [THM]). O peso e altura foram auto-referidos<sup>9,10</sup> e utilizados para o c&#225;lculo do IMC<sup>11</sup>. A circunfer&#234;ncia abdominal (CA) foi medida com o paciente em ortostase<sup>12</sup>, t&#227;o logo esta posi&#231;&#227;o p&#244;de ser assumida. </p>
    <p>Os par&#226;metros laboratoriais avaliados foram os seguintes: glicemia, colesterol total e fra&#231;&#245;es e CKMB, todos realizados por m&#233;todos enzim&#225;ticos, sendo os valores de refer&#234;ncia da CKMB diferentes entre a rede privada e p&#250;blica. A dosagem de troponina foi exclu&#237;da por n&#227;o estar dispon&#237;vel na rede p&#250;blica. A interpreta&#231;&#227;o eletrocardiogr&#225;fica do IAM, segundo as Diretrizes da SBC<sup>8</sup>, coube ao pesquisador e colaboradores.</p>
    <p>Ap&#243;s a inclus&#227;o, os pacientes foram observados at&#233; a alta hospitalar ou o &#243;bito. Os dados referentes &#224; evolu&#231;&#227;o, inclusive a classifica&#231;&#227;o cl&#237;nica de Killip-Kimbal<sup>13 </sup>e as medica&#231;&#245;es usadas, foram obtidos da ficha cl&#237;nica, com eventuais esclarecimentos pelo m&#233;dico assistente.</p>
    <p>A amostra foi constitu&#237;da pelo universo de pacientes com IAM confirmado, internados consecutivamente na rede privada e no hospital p&#250;blico de refer&#234;ncia de Feira de Santana, no per&#237;odo de mar&#231;o de 2006 a janeiro de 2007. N&#227;o houve recusa entre os pacientes da rede privada e no hospital p&#250;blico houve uma recusa.</p>
    <p>A an&#225;lise estat&#237;stica baseou-se em um banco de dados constru&#237;do com o aux&#237;lio do programa SPSS, vers&#227;o 13.0. Os dados foram apresentados de modo comparativo entre os pacientes da rede privada e p&#250;blica. Inicialmente foi feita uma an&#225;lise univariada, comparando o perfil demogr&#225;fico e cl&#237;nico inicial, bem como os principais dados assistenciais e evolutivos. Posteriormente, compararam-se os desfechos prim&#225;rios, letalidade e morbidade, esta &#250;ltima expressa pelo percentual de pacientes com classe Killip &gt;I. A compara&#231;&#227;o foi feita entre os dois tipos de hospital, usando os desfechos isolados e combinados. A signific&#226;ncia da associa&#231;&#227;o entre preditores e os desfechos &#243;bito e Killip classe &gt;I, isolados e combinados, respectivamente, foi posteriormente avaliada, por an&#225;lise bivariada, usando as vari&#225;veis que mostraram diferen&#231;a estatisticamente significante entre os pacientes privados e p&#250;blicos. Em seguida, a independ&#234;ncia das associa&#231;&#245;es foi avaliada por an&#225;lise de regress&#227;o log&#237;stica multivariada, usando o algoritmo "backward".</p>
    <p>Este projeto foi aprovado pelo Comit&#234; de &#201;tica em Pesquisa da Funda&#231;&#227;o Bahiana para o Desenvolvimento das Ci&#234;ncias (FBDC).</p>
    <p>
      <bold>Resultados</bold>
    </p>
    <p>Foram avaliados 150 pacientes entre a rede hospitalar privada e p&#250;blica. Do total de 63 (42,0%) da rede privada, 40 indiv&#237;duos (63,1%) eram do sexo masculino, com idade de 61,1&#177;13,8 anos. Na rede p&#250;blica, dos 87 pacientes (58,0%), 54 (62,1%) eram do sexo masculino, com idade de 60,0&#177;11,6 anos. Os dados demogr&#225;ficos (<xref ref-type="table" rid="a06tab01">Tabela 1</xref>) mostram diferen&#231;a significativa na renda familiar, com 19,0% na faixa de um a dois sal&#225;rios m&#237;nimos na rede privada, contra 70,0% na rede p&#250;blica; e 43,0% na faixa de cinco a dez sal&#225;rios, contra 4,0%, respectivamente (p&lt;0,001). Diferen&#231;a significativa foi observada, tamb&#233;m, na escolaridade, com 6,0% de analfabetos na rede privada <italic>vs</italic> 49,0% na rede p&#250;blica e 36,0% de pacientes com educa&#231;&#227;o m&#233;dia ou superior <italic>vs</italic> 3,4%, respectivamente (p&lt;0,001).</p>
    <p content-type="asset">
      <table-wrap id="a06tab01">
        <graphic xlink:href="1678-4170-abc-93-02-0097-00006-gt01.jpg"/></table-wrap>
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    <p>As caracter&#237;sticas cl&#237;nicas dos pacientes das redes privada e p&#250;blica foram semelhantes em rela&#231;&#227;o a uma elevada preval&#234;ncia de informa&#231;&#227;o positiva sobre fatores de risco, como hipertens&#227;o arterial (HA): mais prevalente nos homens (53/98 [ 54,1%] <italic>vs</italic> 45/98 [ 45,9%], p=0,003); diabete: mais prevalente nas mulheres (24/41 [ 58,5%] <italic>vs</italic> 17/41 [ 41,5%], p=0,001); tabagismo, sobrepeso/obesidade, inatividade f&#237;sica, antecedentes pessoais e hist&#243;ria familiar de DAC. Fez exce&#231;&#227;o dislipidemia, referida por 63,5% dos privados contra 38,0% dos p&#250;blicos (p=0,002) (<xref ref-type="table" rid="a06tab02">Tabela 2</xref>). Esta semelhan&#231;a tamb&#233;m ocorreu com as m&#233;dias levemente elevadas da CA, IMC e press&#227;o arterial (PA) e com a concentra&#231;&#227;o moderadamente elevada da glicemia de jejum. Entretanto, a preval&#234;ncia de colesterol total alto foi maior nos pacientes da rede p&#250;blica (p=0,037). As m&#233;dias da CKMB n&#227;o foram compar&#225;veis devido a t&#233;cnicas com valores referenciais diferentes, com m&#225;ximo normal de at&#233; 25UI na rede privada e at&#233; 6UI na p&#250;blica. Todavia, a partir dos valores m&#233;dios observa-se que na rede privada a m&#233;dia esteve 3,8 vezes acima do valor m&#225;ximo de refer&#234;ncia, enquanto na p&#250;blica 15 vezes. N&#227;o houve diferen&#231;a na topografia do IAM e no tipo de altera&#231;&#227;o do ST (<xref ref-type="table" rid="a06tab02">Tabela 2</xref>). </p>
    <p content-type="asset">
      <table-wrap id="a06tab02">
        <graphic xlink:href="1678-4170-abc-93-02-0097-00006-gt02.jpg"/></table-wrap>
    </p>
    <p>A evolu&#231;&#227;o cl&#237;nica dos pacientes com IAM (<xref ref-type="table" rid="tab03">Tabela 3</xref>) foi muito mais favor&#225;vel nos pacientes privados, 81% em Killip classe I <italic>vs</italic> 18,6% em classe &gt;I, do que nos p&#250;blicos, 52,8% <italic>vs</italic> 47,2%, p=0,004. Os pacientes p&#250;blicos demoraram mais para chegar ao hospital em rela&#231;&#227;o ao in&#237;cio da dor (TDH &gt;1h em 76,9% <italic>vs</italic> 48,6% p=0,003) e foram medicados mais tardiamente (THM <underline>&gt;</underline>15minutos em 47,1% <italic>vs</italic> 8,0%, p&lt;0,001). Um total de 59 pacientes (94,0%) na rede privada foi internado na UTI, contrastando com sete (8,0%) na p&#250;blica. Vale salientar que nos 80 pacientes p&#250;blicos sem acesso &#224; UTI ocorreram 17 dos 20 &#243;bitos (85,0%) observados na amostra total. Em rela&#231;&#227;o aos medicamentos utilizados, houve predom&#237;nio significativo, na rede privada, do uso de trombol&#237;tico, clopidogrel, beta-bloqueador e estatina; apenas o uso de heparina foi mais frequente na rede p&#250;blica (69,0% <italic>vs</italic> 46,0%, p=0,013), com a ressalva do uso de enoxparina na rede privada e de heparina n&#227;o fracionada na rede p&#250;blica. Vale salientar a aus&#234;ncia de diferen&#231;a significativa entre os sexos na distribui&#231;&#227;o destas vari&#225;veis. </p>
    <table-wrap id="tab03">
      <graphic xlink:href="1678-4170-abc-93-02-0097-00006-gt03.jpg"/></table-wrap>
    <p>No caso espec&#237;fico dos trombol&#237;ticos, 101 pacientes (67,3%) eram eleg&#237;veis para o tratamento (IAM com supradesn&#237;vel do ST, <xref ref-type="table" rid="a06tab02">Tabela 2</xref>). Dentre estes, 17 (16,8%) perderam a janela de 12h para a aplica&#231;&#227;o do trombol&#237;tico, o que ocorreu em um paciente da rede privada e em 16 da p&#250;blica. Por&#233;m, dos 84 pacientes restantes (42 privados e 42 p&#250;blicos), somente cerca da metade (49,5%) foi tratada, 34 indiv&#237;duos (81,0%) na rede privada e 16 (38,1%) na rede p&#250;blica, p&lt;0,001. Com rela&#231;&#227;o aos 34 pacientes (40,5%) restantes, eles n&#227;o foram tratados devido a problemas assistenciais, sendo que 26 (76,5%) deles na rede p&#250;blica. </p>
    <p>A letalidade por IAM foi 5,7 vezes mais elevada na rede p&#250;blica do que na rede privada (17 [ 19,5%] <italic>vs</italic> 3 [ 4,8%], p=0,001, <xref ref-type="table" rid="a06tab04">Tabela 4</xref>), e foi predominante em mulheres (12/56 [ 21,4%] <italic>vs</italic> 08/94 [ 8,5%], p=0,028), com raz&#227;o de preval&#234;ncia (RP) de 2,9. Todos os &#243;bitos ocorreram em pacientes com classe Killip &gt;I. Os tr&#234;s &#243;bitos na rede privada foram ocasionados por choque cardiog&#234;nico, insufici&#234;ncia ventricular esquerda refrat&#225;ria e por IAM durante a sess&#227;o de hemodi&#225;lise, respectivamente. Os &#243;bitos na rede p&#250;blica inclu&#237;ram tr&#234;s por morte s&#250;bita, poucas horas ap&#243;s a admiss&#227;o; dois com arritmia ventricular; quatro por choque cardiog&#234;nico e oito por insufici&#234;ncia ventricular esquerda. </p>
    <p content-type="asset">
      <table-wrap id="a06tab04">
        <graphic xlink:href="1678-4170-abc-93-02-0097-00006-gt04.jpg"/></table-wrap>
    </p>
    <p>A morbidade por IAM, avaliada com base no percentual de IAM n&#227;o fatal em classe Killip &gt;I, foi tamb&#233;m 2,7 vezes mais elevada no hospital p&#250;blico (24/70 [ 34,3%] <italic>vs</italic> 9/60 [ 15,0%], p=0,012, <xref ref-type="table" rid="a06tab04">Tabela 4</xref>). Em rela&#231;&#227;o ao g&#234;nero, tamb&#233;m houve diferen&#231;a significativa, 22/33(66,7%) nos homens <italic>vs</italic> 11/33(33,3%) nas mulheres, p=0,014. Quando se considerou o desfecho combinado mortalidade e morbidade, a diferen&#231;a significativa entre rede p&#250;blica e privada se manteve (47,1% <italic>vs</italic> 19,0%, p&lt;0,001). </p>
    <p>Definidas as diferen&#231;as no perfil demogr&#225;fico, cl&#237;nico e evolutivo entre pacientes privados e p&#250;blicos procurou-se verificar, por an&#225;lise bivariada, a influ&#234;ncia dessas vari&#225;veis na letalidade e morbidade. Na <xref ref-type="table" rid="tab05">Tabela 5</xref>, observa-se que as maiores letalidade e morbidade combinadas associaram-se significativamente ao internamento em hospital p&#250;blico; &#224; renda inferior a dois sal&#225;rios m&#237;nimos; &#224; demora no uso de medica&#231;&#227;o espec&#237;fica (THM); &#224; admiss&#227;o fora da UTI e ao n&#227;o uso de trombol&#237;tico. A an&#225;lise bivariada em rela&#231;&#227;o ao uso de beta-bloqueador e estatina foi invalidada em fun&#231;&#227;o do uso desse medicamentos pela maioria dos pacientes em ambos os tipos de hospital: 100% na rede privada e de 87% a 88% da rede p&#250;blica, respectivamente. Entretanto, a an&#225;lise bivariada com desfechos isolados, mostrou mortalidade significativamente mais elevada sem o uso de beta-bloqueador (54,5% <italic>vs</italic> 10,1%, p&lt;0,001). No caso da estatina, tanto a mortalidade como a morbidade foram mais elevadas pelo n&#227;o uso do medicamento, com a mortalidade de 40,0% <italic>vs</italic> 11,4% (p=0,01) e a morbidade de 66,7% <italic>vs</italic> 23,4%, p=0,017, respectivamente. Vale assinalar tamb&#233;m, que, em rela&#231;&#227;o &#224; mortalidade como desfecho isolado, esta foi significativamente maior nas mulheres (21,4% <italic>vs</italic> 8,5% para os homens, p&lt;0,001) e mostrou tend&#234;ncia a ser mais elevada nos analfabetos (21,3% <italic>vs</italic> 9,7%, p=0,053). Em rela&#231;&#227;o &#224; morbidade, esta se mostrou mais frequente nos homens <underline>&gt;</underline>55 anos (35,3% <italic>vs</italic> 11,4%, p=0,013).</p>
    <table-wrap id="tab05">
      <graphic xlink:href="1678-4170-abc-93-02-0097-00006-gt05.jpg"/></table-wrap>
    <p>A an&#225;lise de regress&#227;o log&#237;stica multivariada foi conclu&#237;da com tr&#234;s vari&#225;veis no modelo: duas independentes, o tempo hospital medicamento (THM) <underline>&gt;</underline>15 minutos, com OR de 2,95 (IC 95% 1,38-6,31, p=0,005) e a renda salarial menor que dois sal&#225;rios m&#237;nimos, com OR de 2,92 (IC 95% 1,37-6,23, p=0,06) e a terceira vari&#225;vel, o n&#227;o uso de trombol&#237;tico, em posi&#231;&#227;o limiar, com OR de 2,35 (IC 95% 0,998-5,52, p=0,050). </p>
    <p>
      <bold>Discuss&#227;o</bold>
    </p>
    <p>Neste estudo comparativo da letalidade e morbidade por IAM de pacientes privados e p&#250;blicos, em Feira de Santana, o grande predom&#237;nio de pacientes p&#250;blicos exige an&#225;lise e reflex&#227;o. Enquanto na rede privada a letalidade intra-hospitalar foi acentuadamente baixa (4,8%), compar&#225;vel &#224; de pa&#237;ses com renda per capita acima de US$ 9000.00<sup>12</sup>, a letalidade no hospital p&#250;blico (19,5%) mostrou-se bem acima dos 12,1% dos pa&#237;ses com baixa renda per capita (US$ &lt; 2,900.00)<sup>12</sup> e dos 12,6% observado na rede p&#250;blica do Munic&#237;pio de Niter&#243;i<sup>4</sup>, Rio de Janeiro, e dos 14,5% encontrado em um estudo em Salvador<sup>5</sup>, o qual incluiu os seis principais hospitais das redes privada e p&#250;blica, respectivamente. </p>
    <p>Al&#233;m das caracter&#237;sticas biol&#243;gicas individuais, que condicionam o grau de gravidade da cardiopatia coronariana, v&#225;rios outros fatores concorrem para a gravidade do IAM, com reflexo direto na letalidade e morbidade intra-hospitalar. Dentre estes est&#227;o os cl&#225;ssicos fatores de risco causal, HA, diabete, sobrepeso/obesidade, dislipidemia e tabagismo, e tamb&#233;m condi&#231;&#245;es s&#243;cio-econ&#244;micas desfavor&#225;veis, retardo na chegada ao hospital e qualidade inferior da assist&#234;ncia hospitalar<sup>6,7,12-15</sup>. Neste estudo, o bin&#244;mio baixa renda familiar e baixa escolaridade influiu na maior letalidade e morbidade por IAM dos pacientes p&#250;blicos<sup>6,7,13</sup>. Ambos estes fatores restringem o acesso e a ades&#227;o ao tratamento dos fatores de risco causais, possibilitando um evento coronariano de maior gravidade. Esta afirma&#231;&#227;o est&#225; de acordo com a distribui&#231;&#227;o equitativa dos principais fatores de risco para IAM entre os pacientes privados e p&#250;blicos<sup>13,14</sup>, mais agressivos nos pacientes p&#250;blicos, tendo na menor possibilidade de controle adequado um dos seus principais condicionantes.</p>
    <p>A maior gravidade cl&#237;nica dos pacientes p&#250;blicos se caracterizou pela elevada preval&#234;ncia de pacientes em classe Killip &gt; I, 3,4 vezes maior do que na rede privada, e pela maior eleva&#231;&#227;o do valor da CKMB nos pacientes p&#250;blicos. Estes ind&#237;cios da ocorr&#234;ncia de grandes perdas de mioc&#225;rdio vi&#225;vel est&#227;o de acordo com a expressiva maior letalidade observada nos pacientes p&#250;blicos, com 70% deles morrendo em choque cardiog&#234;nico ou insufici&#234;ncia ventricular esquerda refrat&#225;ria.</p>
    <p>Diante deste cen&#225;rio de maior gravidade do IAM em pacientes p&#250;blicos, &#233; importante considerar poss&#237;veis preditores dentre as vari&#225;veis demogr&#225;ficas, cl&#237;nicas, laboratoriais, evolutivas e terap&#234;uticas que revelaram diferen&#231;a significativa entre pacientes privados e p&#250;blicos e associa&#231;&#227;o significativa com letalidade e morbidade (<xref ref-type="table" rid="tab05">Tabela 5</xref>). No particular, a preponder&#226;ncia da letalidade feminina foi marcante, ocorrendo &#224;s custas de uma alta letalidade na rede p&#250;blica, dez do total dos 12 &#243;bitos femininos, os quais representaram 58,8% dos &#243;bitos p&#250;blicos. Este achado independeu da idade, sugerindo tend&#234;ncia a uma maior mortalidade em IAM prematuros, contrariando a curva biol&#243;gica de mortalidade por DAC nas mulheres, que tende a aumentar, igualando-se &#224; dos homens na p&#243;s-menopausa<sup>16</sup>. Outro aspecto a ser considerado foi a preponder&#226;ncia significativa de antecedente de diabete nas mulheres, fator que se associa a uma maior mortalidade por DAC<sup>17</sup>. Contudo, isto n&#227;o explica esta maior letalidade feminina nos hospitais p&#250;blicos, quando o percentual de mulheres diab&#233;ticas n&#227;o diferiu entre pacientes privados e p&#250;blicos. </p>
    <p>Resta analisar, tamb&#233;m, a maior gravidade do quadro cl&#237;nico dos pacientes p&#250;blicos frente a condicionantes decorrentes do desempenho assistencial. Assim, houve associa&#231;&#227;o significativa de letalidade e morbidade com o tempo entre chegada ao hospital e aten&#231;&#227;o m&#233;dica (THM) <underline>&gt;</underline>15 minutos, altamente predominante nos pacientes p&#250;blicos. Este retardo pode ter favorecido a extens&#227;o do dano mioc&#225;rdico, principalmente se aliado, como ocorreu, a dois outros importantes fatores, uso restrito de trombol&#237;tico e tratamento fora da UTI (<xref ref-type="table" rid="tab05">Tabela 5</xref>). </p>
    <p>No caso do emprego de trombol&#237;ticos ficaram evidentes os problemas assistenciais na rede p&#250;blica, com apenas 38,1% (16/42) dos eleg&#237;veis com janela satisfat&#243;ria sendo devidamente tratados, em oposi&#231;&#227;o a 81,0% (34/42) dos privados. A aus&#234;ncia do uso de trombol&#237;ticos em 26 pacientes eleg&#237;veis merece reflex&#227;o, devendo-se considerar como causas mais prov&#225;veis a falta de treinamento adequado para a administra&#231;&#227;o do medicamento ou a sua indisponibilidade, ambas injustific&#225;veis. No particular, vale salientar que 14 dos 17 &#243;bitos em pacientes p&#250;blicos ocorreram em pacientes eleg&#237;veis que n&#227;o receberam trombol&#237;ticos. A restri&#231;&#227;o de leitos na UTI, impedindo o acesso de 70% de pacientes com IAM a este tipo de tratamento que mudou a hist&#243;ria natural intra-hospitalar do IAM, mostra outro grave problema de gest&#227;o assistencial na rede p&#250;blica, a exigir solu&#231;&#227;o imediata. </p>
    <p>Digno de nota &#233;, tamb&#233;m, o fato de que medicamentos como beta-bloqueador, estatina e clopidogrel, com impacto positivo sobre a letalidade e morbidade do IAM, terem sido usados em 100% dos pacientes privados e em percentual significativamente menor na rede p&#250;blica, embora na faixa dos 87, 88 e 85%, respectivamente<sup>15</sup>. No contexto desses s&#233;rios problemas assistenciais, &#233; importante assinalar que n&#227;o houve diferen&#231;a significativa nas restri&#231;&#245;es entre homens e mulheres, n&#227;o justificando inteiramente a maior letalidade feminina. </p>
    <p>Neste estudo, fatores como renda inferior a dois sal&#225;rios m&#237;nimos e tempo para receber medica&#231;&#227;o cardiovascular espec&#237;fica <underline>&gt;</underline>15 minutos apresentaram-se como preditores independentes de mortalidade e morbidade por IAM. Em terceiro lugar, aparece o n&#227;o uso de trombol&#237;tico, cuja raz&#227;o de chance mostrou signific&#226;ncia estat&#237;stica limiar, mas cuja import&#226;ncia cl&#237;nica est&#225; fora de d&#250;vida. Estas tr&#234;s vari&#225;veis representam, no seu contexto, todas as demais reveladas pela an&#225;lise bivariada e j&#225; discutidas como influentes no desfecho prim&#225;rio deste estudo, maior mortalidade e morbidade por IAM no Hospital P&#250;blico de Feira de Santana. A vari&#225;vel s&#243;cio-econ&#244;mica, como representativa da desigualdade social, n&#227;o cria condi&#231;&#245;es para um cuidado adequado &#224; sa&#250;de, condicionando quadros mais graves de uma mesma patologia, e n&#227;o permite a escolha do local onde ser socorrido. A segunda e a terceira s&#227;o representativas das defici&#234;ncias do servi&#231;o p&#250;blico assistencial, de um modo geral, cujo atendimento insatisfat&#243;rio se inicia na chegada ao hospital, com unidades de emerg&#234;ncia superlotadas e pessoal com treinamento inadequado, culminando com a impossibilidade de oferecer o tratamento intensivo requerido pela doen&#231;a na sua fase aguda. Vale salientar que o fato de hospital p&#250;blico e restri&#231;&#227;o ao tratamento na UTI n&#227;o terem aparecido como vari&#225;veis independentes no modelo final de regress&#227;o log&#237;stica, e o n&#227;o uso de trombol&#237;ticos n&#227;o ter alcan&#231;ado o n&#237;vel de signific&#226;ncia compat&#237;vel com a sua import&#226;ncia cl&#237;nica, n&#227;o diminui o valor desses achados. No modelo log&#237;stico multivariado, o grau de influ&#234;ncia destas vari&#225;veis em rela&#231;&#227;o ao desfecho &#233; analisado em associa&#231;&#227;o com as demais, sobressaindo-se aquela cuja atua&#231;&#227;o independe das demais. No caso de hospital p&#250;blico e tratamento na UTI como vari&#225;veis de risco, elas n&#227;o sobreviveriam na presen&#231;a de outras que est&#227;o diretamente relacionadas ao cuidado assistencial, como &#233; o caso do retardo no atendimento especializado e na qualidade do tratamento representado pelo uso de trombol&#237;ticos. </p>
    <p>Estes achados s&#227;o preocupantes e afirmam, no cen&#225;rio deste estudo, o baixo estrato social como o maior fator de risco para a letalidade e morbidade do IAM, desde o condicionamento de uma doen&#231;a arterial coronariana mais grave at&#233; uma assist&#234;ncia prec&#225;ria, contrariando as normas b&#225;sicas para o tratamento desta condi&#231;&#227;o<sup>2</sup>. O fato da rede p&#250;blica ter sido representada por um &#250;nico hospital, na segunda cidade do Estado da Bahia, com 600.000 habitantes, exp&#245;e mais ainda a gravidade da situa&#231;&#227;o e a necessidade de reformula&#231;&#227;o urgente e competente na assist&#234;ncia ao card&#237;aco no Estado. Com uma demanda crescente de pacientes, face &#224; perspectiva da expans&#227;o das doen&#231;as cardiovasculares no mundo em desenvolvimento<sup>1</sup> &#233; necess&#225;rio um plano estrat&#233;gico, com a implanta&#231;&#227;o de uma rede assistencial que se inicia no cuidado prim&#225;rio e culmina na rede terci&#225;ria, distribu&#237;da de modo apropriado. A diversidade de condi&#231;&#245;es b&#225;sicas, em infra-estrutura e recursos humanos, para o cuidado eficiente ao portador de DCV, imp&#245;e o uso de tecnologia de inform&#225;tica capaz de levar &#224;s unidades de sa&#250;de, na sua decrescente hierarquia de cuidados, a solu&#231;&#227;o &#225;gil aos mais variados problemas diagn&#243;sticos, terap&#234;uticos e preventivos. A infra-estrutura j&#225; existente, do SAMU e do PSF, pode ser muito &#250;til se devidamente organizada na sua operacionalidade e disponibilidade de recursos humanos especializados. Contudo, &#233; imprescind&#237;vel a figura central de um Servi&#231;o P&#250;blico de Cardiologia, no comando dessa rede. </p>
    <p>Este estudo revela a import&#226;ncia da pesquisa na avalia&#231;&#227;o da efici&#234;ncia institucional no cumprimento das suas metas, expondo, na frieza dos dados cient&#237;ficos, quais os principais problemas operacionais a serem solucionados. O estudo teve o m&#233;rito de confirmar a hip&#243;tese de que a letalidade e morbidade por IAM, na cidade de Feira de Santana, &#233; comprovadamente mais elevada em pacientes admitidos no hospital p&#250;blico em compara&#231;&#227;o ao privado, apontando os principais preditores dessa ocorr&#234;ncia. N&#227;o foi planejado para identificar as causas operacionais, as quais devem ser buscadas com outro tipo de desenho, o que, contudo, representa uma etapa fundamental a ser executada. Finalmente, vale chamar a aten&#231;&#227;o de que os achados no cen&#225;rio de Feira de Santana, certamente se aplicam a in&#250;meras institui&#231;&#245;es p&#250;blicas assistenciais no Brasil, embora n&#227;o devam ser generalizados. Exemplo disto s&#227;o os resultados apresentados em estudo semelhante no munic&#237;pio de Niter&#243;i, RJ<sup>15</sup>. Foram estudados 241 pacientes com IAM, selecionados de tr&#234;s hospitais p&#250;blicos (159) e dois privados (82), com letalidade de 12,6 e 12,3%, respectivamente. Em Feira de Santana, a letalidade p&#250;blica foi 35,4% maior e a letalidade privada 64,3% menor, fato que, tamb&#233;m merece registro. Na compara&#231;&#227;o da letalidade na rede privada vale ressaltar a diferen&#231;a na estrat&#233;gia terap&#234;utica, com 68,3% dos pacientes em Niter&#243;i submetidos a procedimentos invasivos (angioplastia em 46,3% e CRM em 23,2%), o que n&#227;o ocorreu em nenhum dos pacientes de Feira de Santana. Enquanto isto, na rede privada de Feira de Santana, 87,2% dos pacientes eleg&#237;veis recebeu trombol&#237;tico, em oposi&#231;&#227;o a 10% dos eleg&#237;veis na rede privada de Niter&#243;i. Na rede p&#250;blica, os percentuais correspondentes foram 31,0% para Feira de Santana e 38,8% para Niter&#243;i, baixos em ambas<sup>18-20</sup>. </p>
    <p>
      <bold>Considera&#231;&#245;es finais</bold>
    </p>
    <p>Do exposto, fica evidente a necessidade premente de que medidas sejam tomadas pelas autoridades sanit&#225;rias para que o monitoramento da letalidade e morbidade das doen&#231;as cardiovasculares em hospitais p&#250;blicos da rede SUS seja rotina peri&#243;dica, a fim de garantir que o seu funcionamento atenda &#224;s recomenda&#231;&#245;es b&#225;sicas das diretrizes da Sociedade Brasileira de Cardiologia, com o objetivo de que as taxas de letalidade e morbidade n&#227;o sejam influenciadas, de modo significativo, por falhas na operacionalidade institucional. Por outro lado &#233; necess&#225;ria a estrutura&#231;&#227;o, a n&#237;vel nacional, do sistema p&#250;blico de assist&#234;ncia cardiovascular, com a integra&#231;&#227;o dos n&#237;veis de cuidado prim&#225;rio, secund&#225;rio e terci&#225;rio, meta indispens&#225;vel para reduzir a preval&#234;ncia e incid&#234;ncia dessas doen&#231;as e melhorar a efici&#234;ncia da sua preven&#231;&#227;o e tratamento.</p>
    <p>
      <bold>Potencial Conflito de Interesses</bold>
    </p>
    <p>Declaro n&#227;o haver conflito de interesses pertinentes.</p>
    <p>
      <bold>Fontes de Financiamento</bold>
    </p>
    <p>O presente estudo n&#227;o teve fontes de financiamento externas.</p>
    <p>
      <bold>Vincula&#231;&#227;o Acad&#234;mica</bold>
    </p>
    <p>Este artigo &#233; parte de tese de Mestrado de Gra&#231;a Maria Tavares de Melo Ferreira pela Funda&#231;&#227;o Bahiana para o Desenvolvimento das Ci&#234;ncias, Escola Bahiana de Medicina e Sa&#250;de P&#250;blica, Funda&#231;&#227;o Oswaldo Cruz/FIOCRUZ.</p>
    <p>
      <fn id="nt02" fn-type="corresp">
        <p>Correspond&#234;ncia:</p>
        <p> Arm&#234;nio Costa Guimar&#227;es </p>
        <p> Rua Guadalajara, 841 / 101, Morro do Gato - Ondina </p>
        <p> 40140-460, Salvador, BA, Brasil </p>
        <p> E-mail: </p>
        <p>
          <email xlink:href="armenioguimaraes@terra.com.br">armenioguimaraes@terra.com.br</email>
        </p>
      </fn>
    </p>
    <p>Artigo recebido em 30/04/08; revisado recebido em 28/07/08; aceito em 26/09/08.</p>
  </body>
  <back>
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        <article-title xml:lang="es">Mayor letalidad y morbilidad por infarto agudo de miocardio en hospital p&#250;blico, en Feira de Santana - Bah&#237;a</article-title>
      </title-group>
      <abstract xml:lang="es">
        <p>FUNDAMENTO: Factores relacionados al nivel socioecon&#243;mico, a la calidad y a la gesti&#243;n asistencial pueden influir en la letalidad y la morbilidad por infarto agudo de miocardio (IAM). OBJETIVO: Comparar letalidad y morbilidad por IAM entre hospital p&#250;blico y privado. M&#201;TODOS: Estudio observacional, con grupos de comparaci&#243;n. Evaluaci&#243;n cl&#237;nica al ingreso y registro de datos diagn&#243;sticos, terap&#233;uticos y evolutivos hasta el alta u &#243;bito. Comparaci&#243;n de las caracter&#237;sticas cl&#237;nicas por an&#225;lisis univariado, seguida de an&#225;lisis bivariado, evaluando la asociaci&#243;n de predictores con &#243;bito y morbilidad (Killip &gt;I), SPSS, versi&#243;n 13,0. RESULTADOS: Se evaluaron a 150 pacientes, 63 pacientes privados (42,0%) y 87 p&#250;blicos (58,0%), con un 63,1% y un 62,1% de varones y edades variando de 61,1&#177;13,8 a 60,0&#177;11,6 a&#241;os, respectivamente. La letalidad por IAM fue de un 19,5% en los pacientes p&#250;blicos vs. un 4,8% en los privados (P=0,001), y la morbilidad (Killip classe &gt;1) de un 34,3% en los p&#250;blicos vs. el 15% en los pacientes privados (P=0,012). Hubo diferencia significativa en los pacientes p&#250;blicos por culpa de la menor renta familiar y de la baja escolaridad (un 70,1% con uno a dos salarios vs. el 19%, P&lt;0,001, y un 49,4% de analfabetos vs. un 6,3%, P&lt;0,001, respectivamente), mayor tiempo transcurrido hasta la llegada al hospital (TDH&gt;1 hora: un 76,9% vs. un 48,6%; P=0,003) y un mayor tiempo transcurrido hasta la administraci&#243;n de los medicamentos (THM&gt;15 minutos: 47,1% vs. 8,0%, P&lt;0,001), UCI para el 8% vs. el 94% en los pacientes privados y tromb&#243;lisis para un 20,6% vs. el 54%, respectivamente (P&lt;0,001). CONCLUSI&#211;N: Letalidad y morbilidad mayor en el paciente p&#250;blico, que se present&#243; m&#225;s severa m&#225;s tard&#237;amente, y recibi&#243; tratamiento de menor calidad.</p>
      </abstract>
      <kwd-group xml:lang="es">
        <kwd>Letalidad</kwd>
        <kwd>morbilidad</kwd>
        <kwd>infarto de miocardio</kwd>
        <kwd>desigualdades en salud</kwd>
        <kwd>pol&#237;tica de salud</kwd>
      </kwd-group>
    </front-stub>
    <body>
      <p>
        <bold>ART&#205;CULO ORIGINAL</bold>
      </p>
      <p><undefined id="topo-body2"/>Mayor letalidad y morbilidad por infarto agudo de miocardio en hospital p&#250;blico, en Feira de Santana - Bah&#237;a</p>
      <p>
        <bold>Gra&#231;a Maria Tavares de Melo Ferreira; Luis Cl&#225;udio Correia; Helena Reis; Carlos Brand&#227;o Ferreira Filho; Francisco Freitas; Guilherme Melo Ferreira; Ivan J&#250;nior; Nelson Oliveira; Arm&#234;nio Costa Guimar&#227;es </bold>
      </p>
      <p>Escola Bahiana de Medicina e Sa&#250;de P&#250;blica (EBMSP) - Funda&#231;&#227;o Bahiana para o Desenvolvimento das Ci&#234;ncias (FBDC), Salvador, BA, Brasil</p>
      <p>Correspondencia</p>
      <p>
        <bold>RESUMEN</bold>
      </p>
      <p><bold>FUNDAMENTO:</bold> Factores relacionados al nivel socioecon&#243;mico, a la calidad y a la gesti&#243;n asistencial pueden influir en la letalidad y la morbilidad por infarto agudo de miocardio (IAM).</p>
      <p><bold>OBJETIVO:</bold> Comparar letalidad y morbilidad por IAM entre hospital p&#250;blico y privado.</p>
      <p><bold>M&#201;TODOS:</bold> Estudio observacional, con grupos de comparaci&#243;n. Evaluaci&#243;n cl&#237;nica al ingreso y registro de datos diagn&#243;sticos, terap&#233;uticos y evolutivos hasta el alta u &#243;bito. Comparaci&#243;n de las caracter&#237;sticas cl&#237;nicas por an&#225;lisis univariado, seguida de an&#225;lisis bivariado, evaluando la asociaci&#243;n de predictores con &#243;bito y morbilidad (Killip &gt;I), SPSS, versi&#243;n 13,0.</p>
      <p><bold>RESULTADOS:</bold> Se evaluaron a 150 pacientes, 63 pacientes privados (42,0%) y 87 p&#250;blicos (58,0%), con un 63,1% y un 62,1% de varones y edades variando de 61,1&#177;13,8 a 60,0&#177;11,6 a&#241;os, respectivamente. La letalidad por IAM fue de un 19,5% en los pacientes p&#250;blicos vs. un 4,8% en los privados (P=0,001), y la morbilidad (Killip classe &gt;1) de un 34,3% en los p&#250;blicos vs. el 15% en los pacientes privados (P=0,012). Hubo diferencia significativa en los pacientes p&#250;blicos por culpa de la menor renta familiar y de la baja escolaridad (un 70,1% con uno a dos salarios vs. el 19%, P&lt;0,001, y un 49,4% de analfabetos vs. un 6,3%, P&lt;0,001, respectivamente), mayor tiempo transcurrido hasta la llegada al hospital (TDH&gt;1 hora: un 76,9% vs. un 48,6%; P=0,003) y un mayor tiempo transcurrido hasta la administraci&#243;n de los medicamentos (THM<underline>&gt;</underline>15 minutos: 47,1% vs. 8,0%, P&lt;0,001), UCI para el 8% vs. el 94% en los pacientes privados y tromb&#243;lisis para un 20,6% vs. el 54%, respectivamente (P&lt;0,001).</p>
      <p><bold>CONCLUSI&#211;N:</bold> Letalidad y morbilidad mayor en el paciente p&#250;blico, que se present&#243; m&#225;s severa m&#225;s tard&#237;amente, y recibi&#243; tratamiento de menor calidad. </p>
      <p><bold>Palabras clave:</bold> Letalidad, morbilidad, infarto de miocardio, desigualdades en salud, pol&#237;tica de salud.</p>
      <p>
        <bold>Introducci&#243;n</bold>
      </p>
      <p>El infarto agudo de miocardio (IAM) es la principal complicaci&#243;n de la EAC<sup>1 </sup>(enfermedad arterial coronaria). La letalidad y morbilidad por IAM dependen de factores relacionados a la severidad de la enfermedad y de la prontitud y calidad de la asistencia hospitalaria. Una vez que el paciente reciba el cuidado hospitalario adecuado en las primeras horas, la letalidad mundial quedar&#225; alrededor del 10%<sup>2</sup>, acerc&#225;ndose al porcentaje observado en los hospitales de las ciudades de R&#237;o de Janeiro (10,8%) y Niter&#243;i (12,3%)<sup>3,4</sup>. Sin embargo, ese porcentaje puede no reflejar la realidad, en el momento en que concurren factores como retraso entre el inicio del dolor y la llegada al hospital, retraso al inicio del tratamiento intrahospitalario, limitaciones en el empleo de medidas de protecciones mioc&#225;rdica, como el uso de trombol&#237;ticos y de angioplastia primaria, y acceso a la unidad de cuidado intensivo<sup>2,5</sup>. Adem&#225;s de eso, las capas sociales de menor renta y escolaridad presentan historia natural de la EAC m&#225;s severa, con posibilidad de mayor letalidad y morbilidad en los primeros 28 d&#237;as post IAM<sup>6,7</sup>. Aunque las razones para ello no est&#225;n bien definidas, es importante registrar que las unidades asistenciales de salud p&#250;blica, ya sean hospitales ya sean puestos de salud, ni siempre cuentan con personal especializado para atenciones de urgencia y emergencia cardiovascular, as&#237; como ocurre "falta" de determinados medicamentos -a ejemplo, los trombol&#237;ticos- y n&#250;mero insuficiente de camas de UCI para atender a la demanda local, condiciones que tienen importante influencia sobre el pron&#243;stico de la enfermedad. Otros factores, como las dificultades en el acceso a una asistencia ambulatoria y hospitalaria especializada de mejor calidad, y limitaciones en el mantenimiento de medidas preventivas adecuadas, de tipo primario o secundario, se han tenido en cuenta<sup>5-7</sup>. </p>
      <p>En Bah&#237;a, el sistema p&#250;blico de atenci&#243;n cardiovascular de alta complejidad presenta serias restricciones, mereciendo un estudio que busque la reformulaci&#243;n del sistema. La ciudad de Feira de Santana -con 600 mil habitantes, mayor ciudad del interior del Estado de Bah&#237;a-, dispone de un hospital p&#250;blico y tres hospitales privados. Los &#250;nicos a poseer estructura para cuidados intensivos, en esos hospitales es d&#243;nde se concentra la atenci&#243;n cardiol&#243;gica, creando condiciones favorables al estudio de esa cuesti&#243;n. As&#237;, tanto el conocimiento sobre la letalidad y la morbilidad en la fase hospitalaria del IAM y el perfil de riesgo coronario de pacientes p&#250;blicos y privados, como la calidad de la asistencia, pueden crear en esa ciudad un importante argumento para la correcci&#243;n de esas graves distorsiones asistenciales.</p>
      <p>Este estudio tiene por objeto comparar la letalidad y la morbilidad por IAM en el hospital p&#250;blico con relaci&#243;n al sistema privado, identificando los principales factores relacionados a sus diversidades. </p>
      <p>
        <bold>M&#233;todos</bold>
      </p>
      <p>Estudio observacional, con grupos de comparaci&#243;n. Se incluyeron a pacientes mayores de 18 a&#241;os, con diagn&#243;stico confirmado de IAM, con base en el tipo y duraci&#243;n del dolor y alteraciones electrocardiogr&#225;ficas y enzim&#225;ticas, seg&#250;n los criterios de la III Directriz sobre Tratamiento del Infarto Agudo de Mioc&#225;rdio8, y que firmaron el TCLE. Se excluyeron a pacientes que no tuvieron condiciones de responder al cuestionario ni de examinarse y observarse adecuadamente o que no aceptaron participar del estudio.</p>
      <p>Los pacientes del sistema p&#250;blico estaban representados por los admitidos en el Hospital General Cl&#233;riston Andrade, con 200 camas, siendo 60 en la Emergencia y 10 en la UCI; y los pacientes del sistema privado, por los admitidos en los hospitales EMEC, con 67 camas, seis en la UCI, S&#227;o Matheus, con 53 camas, seis en la UCI, y UNIMED, con 64 camas, ocho en la UCI.</p>
      <p>Los pacientes se sometieron al examen cl&#237;nico al ingreso, y respondieron tambi&#233;n a un cuestionario sobre los datos demogr&#225;ficos y los factores de riesgo, as&#237; como el tiempo transcurrido entre el inicio del dolor y la llegada al hospital (tiempo dolor-hospital [TDH]) y entre la llegada al hospital y el uso de cualquier medicaci&#243;n espec&#237;fica (tiempo hospital-medicaci&#243;n [THM]). Se utilizaron peso y altura auto-referidos9,10 para el c&#225;lculo del IMC11. Se midi&#243; la cintura abdominal (CA) con el paciente en ortostatismo12, tan pronto como esta posici&#243;n se pudo asumir. </p>
      <p>Los par&#225;metros laboratoriales evaluados fueron los siguientes: glucemia, colesterol total y fracciones y CKMB, todos realizados por m&#233;todos enzim&#225;ticos, siendo los valores de referencia de la CKMB diferentes entre el sistema privado el p&#250;blico. La dosificaci&#243;n de troponina se excluy&#243; por no ser disponible en el sistema p&#250;blico. El investigador y los colaboradores llevaron a cabo la interpretaci&#243;n electrocardiogr&#225;fica del IAM, seg&#250;n las Directrices de la SBC<sup>8</sup>.</p>
      <p>Tras la inclusi&#243;n, se observaron a los pacientes hasta el alta hospitalaria o el &#243;bito. Los datos referentes a la evoluci&#243;n, incluso la clasificaci&#243;n cl&#237;nica de Killip-Kimbal<sup>13</sup>, y las medicaciones empleadas, se obtuvieron de la ficha cl&#237;nica, con eventuales aclaraciones del m&#233;dico asistente.</p>
      <p>La muestra estaba conformada por el universo de pacientes con IAM confirmado, internados consecutivamente en el sistema privado y en el hospital p&#250;blico de referencia de Feira de Santana, en el per&#237;odo de marzo de 2006 a enero de 2007. No hubo recusa entre los pacientes del sistema privado y en el hospital p&#250;blico hubo una recusa.</p>
      <p>El an&#225;lisis estad&#237;stico se bas&#243; en un banco de datos construido con el auxilio del programa SPSS, versi&#243;n 13.0. Los datos se presentaron de modo comparativo entre los pacientes del sistema privado y p&#250;blico. Inicialmente se hizo un an&#225;lisis univariado, comparando el perfil demogr&#225;fico y cl&#237;nico inicial, as&#237; como los principales datos asistenciales y evolutivos. Posteriormente, se compararon los desenlaces primarios, letalidad y morbilidad, esta &#250;ltima expresada por el porcentaje de pacientes con clase Killip &gt;I. La comparaci&#243;n se hizo entre los dos tipos de hospital, usando los desenlaces aislados y combinados. La significancia de la asociaci&#243;n entre predictores y los desenlaces &#243;bito y Killip clase &gt;I, aislados y combinados, respectivamente, se evalu&#243; posteriormente, por an&#225;lisis bivariado, con empleo de variables que mostraron diferencia estad&#237;sticamente significante entre los pacientes privados y p&#250;blicos. Acto seguido, la independencia de las asociaciones se evalu&#243; por an&#225;lisis de regresi&#243;n log&#237;stica multivariada, con uso del algoritmo "backward".</p>
      <p>El Comit&#233; de &#201;tica en Investigaci&#243;n de la Fundaci&#243;n Bahiana para el Desarrollo de las Ciencias (FBDC) aprob&#243; este proyecto.</p>
      <p>
        <bold>Resultados</bold>
      </p>
      <p>Se evaluaron a 150 pacientes entre el sistema hospitalario privado y p&#250;blico. Del total de 63 (42%) del sistema privado, 40 individuos (63,1%) eran del sexo masculino, con edad de 61,1&#177;13,8 a&#241;os. En el sistema p&#250;blico, de los 87 pacientes (58,0%), 54 (62,1%) eran del sexo masculino, con edad de 60,0&#177;11,6 a&#241;os. Los datos demogr&#225;ficos (<xref ref-type="table" rid="es_a06tab01-body2">Tabla 1</xref>) muestran diferencia significativa en la renta familiar, con el 19% en la franja de uno a dos salarios m&#237;nimos en el sistema privado, contra el 70% en el sistema p&#250;blico; y el 43% en la franja de cinco a diez salarios, contra el 4%, respectivamente (P&lt;0,001). Se observ&#243; diferencia significativa, tambi&#233;n en la escolaridad, con el 6% de analfabetos en el sistema privado vs. el 49% en el sistema p&#250;blico y el 36% de pacientes con educaci&#243;n promedio o superior vs. un 3,4%, respectivamente (P&lt;0,001). </p>
      <p content-type="asset">
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      <p>Las caracter&#237;sticas cl&#237;nicas de los pacientes de los sistemas privados y p&#250;blico fueron semejantes con respecto a la elevada prevalencia de informaci&#243;n positiva sobre factores de riesgo, como hipertensi&#243;n arterial (HA): m&#225;s prevalente en los varones (53/98 [54,1%] vs. 45/98 [45,9%], P=0,003); diabetes: m&#225;s prevalente en las mujeres (24/41 [58,5%] vs. 17/41 [41,5%], P=0,001); tabaquismo, sobrepeso/obesidad, inactividad f&#237;sica, antecedentes personales e historia familiar de EAC. A excepci&#243;n de la dislipidemia, referida por un 63,5% de los pacientes privados, contra el 38% de los p&#250;blicos (P=0,002) (<xref ref-type="table" rid="es_a06tab02-body2">Tabla 2</xref>). Esta semejanza tambi&#233;n ocurri&#243; con los promedios levemente elevados de la CA, IMC y presi&#243;n arterial (PA) y con la concentraci&#243;n moderadamente elevada de la glucemia de ayuno. Sin embargo, la prevalencia de colesterol total alto fue mayor en los pacientes del sistema p&#250;blico (P=0,037). Los promedios de la CK MB no fueron comparables debido a t&#233;cnicas con valores referenciales diferentes, con m&#225;ximo normal de hasta 25UI en el sistema privado y hasta 6UI en el p&#250;blico. No obstante, a partir de los valores promedios se observa que en el sistema privado, el promedio estuvo 3,8 veces arriba del valor m&#225;ximo de referencia, mientras que en el sistema p&#250;blico estuvo 15 veces. No hubo diferencia en la topograf&#237;a del IAM y en el tipo de alteraci&#243;n del ST (<xref ref-type="table" rid="es_a06tab02-body2">Tabla 2</xref>). </p>
      <p content-type="asset">
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      <p>La evoluci&#243;n cl&#237;nica de los pacientes con IAM (<xref ref-type="table" rid="tab3-body2">Tabla 3</xref>) fue mucho m&#225;s favorable en los pacientes privados, 81% en Killip clase I vs. 18,6% en clase &gt;I, que en los p&#250;blicos, un 52,8% vs. Un 47,2%, p=0,004. Los pacientes p&#250;blicos tardaron m&#225;s a llegar al hospital con relaci&#243;n al inicio del dolor (TDH &gt;1h en un 76,9% vs. un 48,6% P=0,003) y se les administraron los medicamentos m&#225;s tard&#237;amente (THM <underline>&gt;</underline>15minutos en un 47,1% vs. el 8%, P&lt;0,001). Se intern&#243; a un total de 59 (94%) de los pacientes del sistema privado en la UCI, a diferencia del sistema p&#250;blico, con siete pacientes (8%) internados. Vale resaltar que en los 80 pacientes p&#250;blicos sin acceso a la UCI ocurrieron 17 de los 20 &#243;bitos (85%) observados en la muestra total. Respecto a los medicamentos utilizados, hubo predominio significativo, en el sistema privado, del uso de trombol&#237;tico, clopidogrel, betabloqueante y estatina; solamente el uso de heparina fue m&#225;s frecuente en el sistema p&#250;blico (69% vs. 46%, P=0,013), a excepci&#243;n del empleo de enoxparina en el sistema privado y de heparina no fraccionada en el p&#250;blico. Vale resaltar la ausencia de diferencia significativa entre los sexos en la distribuci&#243;n de estas variables. </p>
      <table-wrap id="tab3-body2">
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      <p>En el caso espec&#237;fico de los trombol&#237;ticos, 101 pacientes (67,3%) eran elegibles para el tratamiento (IAM con supradesnible del ST, <xref ref-type="table" rid="es_a06tab02-body2">Tabla 2</xref>). Entre &#233;stos, 17 (16,8%) perdieron la ventana de 12h para la aplicaci&#243;n del trombol&#237;tico, lo que ocurri&#243; en un paciente del sistema privado y un 16 del p&#250;blico. Sin embargo, de los 84 pacientes restantes (42 privados y 42 p&#250;blicos), se trat&#243; solamente a cerca de la mitad (49,5%), 34 individuos (81,0%) en el sistema privado y 16 (38,1%) en el sistema p&#250;blico, P&lt;0,001. Respecto a los 34 pacientes (40,5%) restantes, no se les trataron debido a problemas asistenciales, siendo que 26 (76,5%) de ellos eran del sistema p&#250;blico. </p>
      <p>La letalidad por IAM fue 5,7 veces m&#225;s elevada en el sistema p&#250;blico que en el sistema privado (17 [19,5%] vs. 3 [4,8%], P=0,001, <xref ref-type="table" rid="es_a06tab04-body2">Tabla 4</xref>), y fue predominante en mujeres (12/56 [21,4%] vs. 08/94 [8,5%], P=0,028), con raz&#243;n de prevalencia (RP) de 2,9. Todos los &#243;bitos ocurrieron en pacientes con clase Killip &gt;I. Los tres &#243;bitos en el sistema privado fueron ocasionados por shock cardiog&#233;nico, insuficiencia ventricular izquierda refractaria y por IAM durante la sesi&#243;n de hemodi&#225;lisis, respectivamente. Los &#243;bitos en el sistema p&#250;blico incluyeron tres por muerte s&#250;bita, pocas horas tras el ingreso; dos con arritmia ventricular; cuatro por shock cardiog&#233;nico y ocho por insuficiencia ventricular izquierda. </p>
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      <p>La morbilidad por IAM, evaluada con base en el porcentaje de IAM no fatal en clase Killip &gt;I, fue tambi&#233;n 2,7 veces m&#225;s elevada en el hospital p&#250;blico (24/70 [34,3%] vs. 9/60 [15,0%], P=0,012, <xref ref-type="table" rid="es_a06tab04-body2">Tabla 4</xref>). Con relaci&#243;n al g&#233;nero, tambi&#233;n hubo diferencia significativa, 22/33 (66,7%) en los varones vs. 11/33 (33,3%) en las mujeres, P=0,014. Cuando se consider&#243; el desenlace combinando mortalidad y morbilidad, la diferencia significativa entre el sistema p&#250;blico y el privado se mantuvo (47,1% vs. 19%, p&lt;0,001). </p>
      <p>Definidas las diferencias en el perfil demogr&#225;fico, cl&#237;nico y evolutivo entre pacientes privados y p&#250;blicos se busc&#243; verificar, por an&#225;lisis bivariado, la influencia de esas variables en la letalidad y morbilidad. En la <xref ref-type="table" rid="tab5-body2">Tabla 5</xref>, se observa que la mayor letalidad y morbilidad combinadas se asoci&#243; significativamente al internamiento en hospital p&#250;blico; a la renta inferior a dos salarios m&#237;nimos; a la demora en el uso de medicaci&#243;n espec&#237;fica (THM); al ingreso fuera de la UCI y al no uso de trombol&#237;tico. El an&#225;lisis bivariado con relaci&#243;n al uso de betabloqueante y estatina fue invalidado en funci&#243;n del uso de esos medicamentos por la mayor&#237;a de los pacientes en ambos tipos de hospital: el 100% en el sistema privado y del 87% al 88% en el sistema p&#250;blico, respectivamente. Sin embargo, el an&#225;lisis bivariado con desenlaces aislados evidenci&#243; mortalidad significativamente m&#225;s elevada sin el uso de betabloqueante (54,5% vs. 10,1%, P&lt;0,001). En el caso de la estatina, tanto la mortalidad como la morbidad fueron m&#225;s elevadas por el no uso del medicamento, con la mortalidad del 40% vs. un 11,4% (P=0,01) y la morbilidad de un 66,7% vs. un 23,4% &#177; P=0,017, respectivamente. Vale se&#241;alar tambi&#233;n que, en cuanto a la mortalidad como desenlace aislado, &#233;sta fue significativamente mayor en las mujeres (21,4% vs. 8,5% para los varones, P&lt;0,001) y present&#243; tendencia a ser m&#225;s elevada en los analfabetos (21,3% vs. 9,7%, P=0,053). Con relaci&#243;n a la morbilidad, &#233;sta fue m&#225;s frecuente en los varones <underline>&gt;</underline>55 a&#241;os (35,3% vs. 11,4%, P=0,013).</p>
      <table-wrap id="tab5-body2">
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      <p>El an&#225;lisis de regresi&#243;n log&#237;stica multivariada se concluy&#243; con tres variables en el modelo: dos independientes, el tiempo hospital-medicaci&#243;n (THM) <underline>&gt;</underline>15 minutos, con OR de 2,95 (IC 95% 1,38-6,31, P=0,005) y la renta salarial menor que dos salarios m&#237;nimos, con OR de 2,92 (IC 95% 1,37-6,23, P=0,06) y la tercera variable, el no uso de trombol&#237;tico, en posici&#243;n umbral, con OR de 2,35 (IC 95% 0,998-5,52, P=0,050). </p>
      <p>
        <bold>Discusi&#243;n</bold>
      </p>
      <p>En este estudio comparativo de la letalidad y morbilidad por IAM de pacientes privados y p&#250;blicos, en Feira de Santana, el gran predominio de pacientes p&#250;blicos exige an&#225;lisis y reflexi&#243;n. Mientras que en el sistema privado la letalidad intrahospitalaria fue acentuadamente baja (4,8%), comparable a la de pa&#237;ses con renta per c&#225;pita superior a U$S 9.000,00<sup>12</sup>, la letalidad en el hospital p&#250;blico (19,5%) se present&#243; bastante superior a un 12,1% de los pa&#237;ses con baja renta per c&#225;pita (U$S &lt; 2.900,00)<sup>12</sup> y a un 12,6% observado en el sistema p&#250;blico de los municipios de Niter&#243;i<sup>4</sup>, R&#237;o de Janeiro, y un 14,5% encontrado en un estudio en Salvador<sup>5</sup>, lo que incluy&#243; sus principales hospitales de los sistemas privado y p&#250;blico, respectivamente. </p>
      <p>Adem&#225;s de las caracter&#237;sticas biol&#243;gicas individuales, que condicionan el grado de severidad de la cardiopat&#237;a coronaria, diversos otros factores compiten para la severidad del IAM, con reflejo directo en la letalidad y morbilidad intrahospitalaria. Entre ellos est&#225;n los cl&#225;sicos factores de riesgo causal, HA, diabetes, sobrepeso/obesidad, dislipidemia y tabaquismo, y tambi&#233;n condiciones socioecon&#243;micas desfavorables, retraso en la llegada al hospital y calidad inferior a la asistencia hospitalaria<sup>6,7,12-15</sup>. En este estudio, la baja renta familiar y la baja escolaridad influyeron en la mayor letalidad y morbidad por IAM de los pacientes p&#250;blicos<sup>6,7,13</sup>. Ambos factores restringen el acceso y la adhesi&#243;n al tratamiento de los factores de riesgos causales, posibilitando un evento coronario de mayor severidad. Esta afirmaci&#243;n est&#225; de acuerdo con la distribuci&#243;n equitativa de los principales factores de riesgo para IAM entre los pacientes privados y p&#250;blicos<sup>13,14</sup>, m&#225;s agresivos en los pacientes p&#250;blicos, teniendo en la menor posibilidad de control adecuado uno de sus principales condicionantes. </p>
      <p>La mayor severidad cl&#237;nica de los pacientes p&#250;blicos se caracteriz&#243; por la elevada prevalencia de pacientes en clase Killip &gt; I, 3,4 veces mayor que en el sistema privado, y por la mayor elevaci&#243;n del valor de la CK MB en los pacientes p&#250;blicos. Estos indicios de la ocurrencia de grandes p&#233;rdidas de miocardio viable est&#225;n de acuerdo con la expresiva mayor letalidad observada en los pacientes p&#250;blicos. De ellos, el 70% muri&#243; de shock cardiog&#233;nico o insuficiencia ventricular izquierda refractaria. </p>
      <p>Ante este escenario de mayor severidad del IAM en pacientes p&#250;blicos, es importante considerar posibles predictores entre las variables demogr&#225;ficas, cl&#237;nicas, laboratoriales, evolutivas y terap&#233;uticas que revelaron diferencia significativa entre pacientes privados y p&#250;blicos y asociaci&#243;n significativa con letalidad y morbilidad (<xref ref-type="table" rid="tab5-body2">Tabla 5</xref>). En el particular, la preponderancia de la letalidad femenina se sobresali&#243;, ocurriendo a expensa de una alta letalidad en el sistema p&#250;blico, 10 del total de los 12 &#243;bitos femeninos, los que representaron un 58,8% de los &#243;bitos p&#250;blicos. Este hallazgo se llev&#243; a cabo independientemente de la edad, sugiriendo tendencia a una mayor mortalidad en IAM prematuros, lo que contraria la curva biol&#243;gica de mortalidad por EAC en las mujeres, que tiende a aumentar, igual&#225;ndose a la de los varones en la postmenopausa<sup>16</sup>. Otro aspecto a tener en cuenta fue la preponderancia significativa de antecedente de diabetes en las mujeres, factor que se asocia a una mayor mortalidad por EAC<sup>17</sup>. Sin embargo, esto no explica esta mayor letalidad femenina en los hospitales p&#250;blicos, cuando el porcentaje de mujeres diab&#233;ticas no difiri&#243; entre pacientes privados y p&#250;blicos. </p>
      <p>S&#243;lo nos resta analizar, tambi&#233;n, la mayor severidad del cuadro cl&#237;nico de los pacientes p&#250;blicos ante condicionantes consecuentes del desempe&#241;o asistencial. As&#237;, hubo asociaci&#243;n significativa de letalidad y morbilidad con el tiempo entre llegada al hospital y atenci&#243;n m&#233;dica (THM) <underline>&gt;</underline>15 minutos, altamente predominante en los pacientes p&#250;blicos. Este retraso puede haber favorecido la extensi&#243;n de da&#241;o mioc&#225;rdico, principalmente si en conjunto, como ocurri&#243;, a dos otros importantes factores, uso restricto de trombol&#237;tico y tratamiento fuera de la UCI (<xref ref-type="table" rid="tab5-body2">Tabla 5</xref>). </p>
      <p>En el caso del empleo de trombol&#237;ticos quedaron evidentes los problemas asistenciales en el sistema p&#250;blico, con solamente un 38,1% (16/42) de los elegibles con ventana satisfactoria siendo debidamente tratados, en oposici&#243;n al 81% (34/42) de los privados. La ausencia del uso de trombol&#237;ticos en 26 pacientes elegibles merece una reflexi&#243;n. Y se deben considerar como causas m&#225;s probables la falta de entrenamiento adecuado para la administraci&#243;n del medicamento o su indisponibilidad, ambas injustificables. En el particular, vale resaltar que 14 de los 17 &#243;bitos en pacientes p&#250;blicos ocurrieron en pacientes elegibles que no recibieron trombol&#237;ticos. La restricci&#243;n de camas en la UCI, impidiendo el acceso del 70% de pacientes con IAM a este tipo de tratamiento que cambi&#243; la historia natural intrahospitalaria del IAM, evidencia otro grave problema de gesti&#243;n asistencial en el sistema p&#250;blico, la exigencia de soluci&#243;n inmediata.</p>
      <p>Digno de nota es, tambi&#233;n, el hecho de que medicamentos como betabloqueante, estatina y clopidogrel, con impacto positivo sobre la letalidad y morbilidad do IAM, haber sido empleados en el 100% de los pacientes privados y en el porcentaje significativamente menor en el sistema p&#250;blico, aunque en la franja del 87%, el 88% y el 85%, respectivamente<sup>15</sup>. En el contexto de esos serios problemas asistenciales, es importante se&#241;alar que no hubo diferencia significativa en las restricciones entre varones y mujeres, sin justificar completamente la mayor letalidad femenina. </p>
      <p>En este estudio, factores como salario inferior a dos salarios m&#237;nimos y tiempo para la toma de medicamento cardiovascular espec&#237;fico <underline>&gt;</underline>15 minutos se presentaron como predictores independientes de mortalidad y morbilidad por IAM. En tercer lugar, est&#225; el no empleo de trombol&#237;tico, cuya raz&#243;n de probabilidad present&#243; umbral estad&#237;stico, cuya importancia cl&#237;nica est&#225; fuera de dudas. Estas tres variables representan, en su contexto, todas las dem&#225;s reveladas por el an&#225;lisis bivariado y ya discutidas como influyentes en el desenlace primario de este estudio, mayor mortalidad y morbilidad por IAM en el Hospital P&#250;blico de Feira de Santana. La variable socioecon&#243;mica, como representativa de la desigualdad social, no crea condiciones para un cuidado adecuado a la salud, condicionando cuadros m&#225;s severos de una misma patolog&#237;a, y no permite la elecci&#243;n del local donde se pueda socorrer al paciente. La segunda y la tercera son representativas de las deficiencias del servicio p&#250;blico asistencial, de un modo general, cuya atenci&#243;n insatisfactoria se inicia en la llegada al hospital, con unidades de emergencia excediendo su capacidad y personal con entrenamiento inadecuado, culminando en la imposibilidad de ofrecer el tratamiento intensivo requerido por la enfermedad en su fase aguda. Vale resaltar que el hecho de el hospital p&#250;blico y la restricci&#243;n al tratamiento en la UCI no estar como variables independientes en el modelo final de regresi&#243;n log&#237;stica, y el no empleo de trombol&#237;ticos no haber alcanzado el nivel de significancia compatible con su importancia cl&#237;nica, no disminuye el valor de esos hallazgos. En el modelo log&#237;stico multivariado, el grado de influencia de estas variables en cuanto al desenlace se analiza en asociaci&#243;n con las dem&#225;s, sobresali&#233;ndose aquella cuya actuaci&#243;n independe de las dem&#225;s. En el caso del hospital p&#250;blico y del tratamiento en la UCI como variables de riesgo, ellas no supervivir&#237;an en la presencia de otras que est&#225;n directamente relacionadas al cuidado asistencial, como es el caso del retraso en la atenci&#243;n especializada y en la calidad del tratamiento representado por el empleo de trombol&#237;ticos. </p>
      <p>Estos hallazgos son preocupantes y afirman, en el escenario de este estudio, la baja capa social como el mayor factor de riesgo para la letalidad y morbilidad del IAM, desde el condicionamiento de una enfermedad arterial coronaria m&#225;s severa hasta una asistencia precaria, contrariando las normas b&#225;sicas para el tratamiento de esta condici&#243;n<sup>2</sup>. El hecho del sistema p&#250;blico haber sido representado por un &#250;nico hospital, en la segunda ciudad del estado de Bah&#237;a, con 600 mil habitantes, expone m&#225;s a&#250;n la severidad de la situaci&#243;n y la necesidad de reformulaci&#243;n urgente y competente en la asistencia al cardiaco en la regi&#243;n. Con una demanda creciente de pacientes, ante la perspectiva de la expansi&#243;n de las enfermedades cardiovasculares en el mundo en desarrollo<sup>1</sup> es necesario un plan estrat&#233;gico, con la implantaci&#243;n de una red asistencial que se inicia en el cuidado primario y culmina en la red terciaria, distribuida de modo apropiado. La diversidad de condiciones b&#225;sicas, en infraestructura y recursos humanos, para el cuidado eficiente al portador de DCV, impone el uso de tecnolog&#237;a de inform&#225;tica capaz de llevar a las unidades de salud, en su decreciente jerarqu&#237;a de cuidados, la soluci&#243;n &#225;gil a los m&#225;s variados problemas diagn&#243;sticos, terap&#233;uticos y preventivos. La infraestructura ya existente, del SAMU (<italic>Servicio de Atenci&#243;n M&#243;vil de Urgencia</italic>) y del PSF (<italic>Programa Salud de la Fam&#237;lia</italic>), puede ser muy &#250;til si debidamente organizada en su operacionalidad y disponibilidad de recursos humanos especializados. Sin embargo, es imprescindible la figura central de un Servicio P&#250;blico de Cardiolog&#237;a, en el comando de esa red. </p>
      <p>Este estudio revela la importancia de la investigaci&#243;n en la evaluaci&#243;n de la eficiencia institucional en el cumplimiento de sus metas, exponiendo, en la frialdad de los datos cient&#237;ficos, los principales problemas operacionales a solucionar. El estudio tuvo el m&#233;rito de confirmar la hip&#243;tesis de que la letalidad y morbilidad por IAM, en la ciudad de Feira de Santana, es comprobadamente m&#225;s elevada en pacientes ingresados en el hospital p&#250;blico en comparaci&#243;n al privado, se&#241;alando los principales predictores de esa ocurrencia. No se planific&#243; identificar las causas operacionales, las que se deben buscar con otro tipo de dibujo. Sin embargo, lo que representa una etapa fundamental a ejecutar. Por fin, vale resaltar que los hallazgos en el escenario de Feira de Santana, ciertamente se aplican a innumeras instituciones p&#250;blicas asistenciales en el Brasil, aunque no se debe generalizar. Un ejemplo de esto son los resultados presentados en estudio semejante en el municipio de Niter&#243;i, RJ<sup>15</sup>. Se estudiaron a 241 pacientes con IAM, seleccionados de tres hospitales p&#250;blicos (159) y de dos privados (82), con letalidad de un 12,6% y un 12,3%, respectivamente. En Feira de Santana, la letalidad p&#250;blica fue un 35,4% mayor y la letalidad privada un 64,3% menor, hecho que tambi&#233;n merece registro. En la comparaci&#243;n de la letalidad en el sistema privado vale resaltar la diferencia en la estrategia terap&#233;utica, con un 68,3% de los pacientes en Niter&#243;i sometidos a procedimientos invasivos (angioplastia en un 46,3% y CRM en un 23,2%), lo que no ocurri&#243; en ninguno de los pacientes de Feira de Santana. Mientras ello, en el sistema privado de Feira de Santana, un 87,2% de los pacientes elegibles recibi&#243; trombol&#237;tico, en oposici&#243;n al 10% de los elegibles en el sistema privado de Niter&#243;i. En el sistema p&#250;blico, los porcentajes correspondientes fueron el 31% para Feira de Santana y un 38,8% para Niter&#243;i, bajos en ambas<sup>18-20</sup>. </p>
      <p>
        <bold>Consideraciones Finales</bold>
      </p>
      <p>De todo el expuesto, queda evidente la necesidad apremiante de que las autoridades sanitarias tomen medidas para que el monitoreo de la letalidad y morbilidad de las enfermedades cardiovasculares en hospitales p&#250;blicos del sistema SUS (Sistema &#218;nico de Salud) sea una rutina peri&#243;dica, a fin de garantizar que su funcionamiento atienda las recomendaciones b&#225;sicas de las directrices de la Sociedad Brasile&#241;a de Cardiolog&#237;a, con el objetivo de que las fallas en la operacionalidad institucional no influencien las tasas de letalidad y morbidad de modo significativo. Por otro lado es necesaria la estructuraci&#243;n, a nivel nacional, del sistema p&#250;blico de asistencia cardiovascular, con la integraci&#243;n de los niveles de cuidado primario, secundario y terciario, meta indispensable para reducir la prevalencia e incidencia de esas enfermedades y mejorar la eficiencia de su prevenci&#243;n y tratamiento.</p>
      <p>
        <bold>Potencial Conflicto de Intereses</bold>
      </p>
      <p>Declaro no haber conflicto de intereses pertinentes.</p>
      <p>
        <bold>Fuentes de Financiaci&#243;n</bold>
      </p>
      <p>El presente estudio no tuvo fuentes de financiaci&#243;n externas.</p>
      <p>
        <bold>Vinculaci&#243;n Acad&#233;mica</bold>
      </p>
      <p>Este art&#237;culo forma parte de tesis de Maestr&#237;a de Gra&#231;a Maria Tavares de Melo Ferreira, por la Fundaci&#243;n Bahiana para el Desarrollo de las Ciencias, Escuela Bahiana de Medicina y Salud P&#250;blica, Fundaci&#243;n Oswaldo Cruz/FIOCRUZ.</p>
      <p>
        <bold>Referencias</bold>
      </p>
    </body>
  </sub-article>
  <sub-article article-type="translation" id="TRen" xml:lang="en">
    <front-stub>
      <article-categories>
        <subj-group subj-group-type="heading">
          <subject>Original Articles</subject>
        </subj-group>
      </article-categories>
      <title-group>
        <article-title xml:lang="en">Increased mortality and morbidity due to acute myocardial infarction in a public hospital, in Feira de Santana, Bahia</article-title>
      </title-group>
      <abstract xml:lang="en">
        <p>BACKGROUND: Factors related to socioeconomic status and health care quality and management may influence mortality and morbidity rates due to acute myocardial infarction (AMI). OBJECTIVE: To compare mortality and morbidity in patients with AMI hospitalized in public and private hospitals. METHODS: An observational study, with comparison groups. Clinical evaluation on admission, and recording of diagnostic, therapeutic and evolution data until discharge or death. Comparison of clinical characteristics by univariate analysis followed by bivariate analysis, evaluating the combination of predictors with death and morbidity (Killip&gt; I), SPSS, version 13.0. RESULTS: 150 patients were evaluated, 63 (42.0%) of private hospitals and 87 (58.0%) of public hospitals, with 63.1% and 62.1% of males, aged 61.1 &#177; 13.8 and 60.0 &#177; 11.6 years, respectively. The mortality from AMI was 19.5% in public hospitals vs 4.8% in private hospitals (p = 0.001), and morbidity (Killip class&gt; I) was 34.3% in public hospitals vs 15.0% in private hospitals (p = 0.012). There was a significant difference between public and private patients, due to lower family income and education (70.1% with one to two salaries vs 19.0%, p &lt;0.001, and 49.4% of illiterates vs 6.3%, p &lt;0.001, respectively ); late arrival at the hospital (HAT&gt; 1 hour: 76.9% vs 48.6%, p = 0.003); and a longer period of time before being medicated (AMT &gt; 15 minutes: 47.1% vs 8.0%; p &lt;0.001); ICU for 8% of the patients in public hospitals vs 94% in private hospitals; and thrombolysis for 20.6% vs 54.0%, respectively (p &lt;0.001). CONCLUSION: Mortality and morbidity were greater among public patients, which presented more serious conditions, arrived later at the hospital and received lower quality treatment.</p>
      </abstract>
      <kwd-group xml:lang="en">
        <kwd>Lethality</kwd>
        <kwd>morbidity</kwd>
        <kwd>myocardial infarction</kwd>
        <kwd>health inequalities</kwd>
        <kwd>health policy</kwd>
      </kwd-group>
    </front-stub>
    <body>
      <p>
        <bold>ORIGINAL ARTICLE</bold>
      </p>
      <p><undefined id="cima-body3"/>Increased mortality and morbidity due to acute myocardial infarction in a public hospital, in Feira de Santana, Bahia</p>
      <p>
        <bold>Gra&#231;a Maria Tavares de Melo Ferreira; Luis Cl&#225;udio Correia; Helena Reis; Carlos Brand&#227;o Ferreira Filho; Francisco Freitas; Guilherme Melo Ferreira; Ivan J&#250;nior; Nelson Oliveira; Arm&#234;nio Costa Guimar&#227;es</bold>
      </p>
      <p>Escola Bahiana de Medicina e Sa&#250;de P&#250;blica (EBMSP) - Funda&#231;&#227;o Bahiana para o Desenvolvimento das Ci&#234;ncias (FBDC), Salvador, BA, Brazil</p>
      <p>Mailing address</p>
      <p>
        <bold>SUMMARY</bold>
      </p>
      <p><bold>BACKGROUND:</bold> Factors related to socioeconomic status and health care quality and management may influence mortality and morbidity rates due to acute myocardial infarction (AMI).</p>
      <p><bold>OBJECTIVE:</bold> To compare mortality and morbidity in patients with AMI hospitalized in public and private hospitals.</p>
      <p><bold>METHODS:</bold> An observational study, with comparison groups. Clinical evaluation on admission, and recording of diagnostic, therapeutic and evolution data until discharge or death. Comparison of clinical characteristics by univariate analysis followed by bivariate analysis, evaluating the combination of predictors with death and morbidity (Killip&gt; I), SPSS, version 13.0.</p>
      <p><bold>RESULTS:</bold> 150 patients were evaluated, 63 (42.0%) of private hospitals and 87 (58.0%) of public hospitals, with 63.1% and 62.1% of males, aged 61.1 &#177; 13.8 and 60.0 &#177; 11.6 years, respectively. The mortality from AMI was 19.5% in public hospitals <italic>vs</italic> 4.8% in private hospitals (p = 0.001), and morbidity (Killip class&gt; I) was 34.3% in public hospitals <italic>vs</italic> 15.0% in private hospitals (p = 0.012). There was a significant difference between public and private patients, due to lower family income and education (70.1% with one to two salaries <italic>vs</italic> 19.0%, p &lt;0.001, and 49.4% of illiterates <italic>vs</italic> 6.3%, p &lt;0.001, respectively ); late arrival at the hospital (HAT&gt; 1 hour: 76.9% <italic>vs</italic> 48.6%, p = 0.003); and a longer period of time before being medicated (AMT <underline>&gt;</underline> 15 minutes: 47.1% <italic>vs</italic> 8.0%; p &lt;0.001); ICU for 8% of the patients in public hospitals <italic>vs</italic> 94% in private hospitals; and thrombolysis for 20.6% <italic>vs</italic> 54.0%, respectively (p &lt;0.001).</p>
      <p><bold>CONCLUSION:</bold> Mortality and morbidity were greater among public patients, which presented more serious conditions, arrived later at the hospital and received lower quality treatment. </p>
      <p><bold>Key words:</bold> Lethality; morbidity; myocardial infarction; health inequalities; health policy.</p>
      <p>
        <bold>Introduction</bold>
      </p>
      <p>Acute myocardial infarction (AMI) is the main complication of CAD<sup>1</sup>. The mortality and morbidity from AMI depends on factors related to the severity of the disease and the speed and quality of hospital care. If the patient receives appropriate hospital care within few hours after onset of the symptoms, the mortality worldwide is around 10%<sup>2,</sup> similar to that observed in the hospitals of the cities of Rio de Janeiro (10.8%) and Niter&#243;i (12.3%)<sup>3,4</sup>. However, this percentage may not reflect the reality when there are factors such as delay between the onset of pain and arrival at the hospital, delay in the start of in-hospital treatment, restrictions on the use of myocardial protection measures, such as primary angioplasty and thrombolytics, and on access to intensive care unit<sup>2,5</sup>. In addition, the social strata of lower income and education show a more serious natural history of CAD, with the possibility of higher mortality and morbidity in the first 28 days post-AMI<sup>6,7</sup>. Although the reasons for this are not well defined, it is noteworthy that public health care units, such as hospitals and health care centers, do not always have a specialized staff for emergency cardiovascular care, there is scarcity of certain drugs, such as thrombolytics, and there are insufficient number of beds in ICU to meet local demand, and these are issues that have an important influence on the prognosis of the disease. Other factors like limited access to a specialized hospital or outpatient care unit of better quality, and limitations on the maintenance of appropriate preventive measures of primary or secondary type have also been considered<sup>5-7</sup>.</p>
      <p>In Bahia, there are serious limitations on high complexity cardiovascular care in the public system, which needs to be reviewed, aiming at a recasting of the system. The city of Feira de Santana, with 600,000 inhabitants, the largest city of inland Bahia State, has only one public hospital and three private hospitals with intensive care units, where all the cardiological care of the region takes place, creating favorable conditions for the study of these issues. Therefore, the assessment of the mortality and morbidity in the hospital phase of AMI, the coronary risk profile of public and private patients, and the quality of health care in that city can provide relevant data to help correct these serious distortions in the health care system.</p>
      <p>The objective of this study is to compare the mortality and morbidity from AMI in public and private hospitals, identifying key factors associated with the differences in their rates.</p>
      <p>
        <bold>Methods </bold>
      </p>
      <p>This was an observational study, with groups of comparison. We included patients over 18 years of age, with confirmed diagnosis of AMI, based on the type and duration of pain and electrocardiographic and enzyme changes, according to the criteria of the III Guideline on the Treatment of Acute Myocardial Infarction<sup>8</sup>, all of whom had signed the informed consent form. We excluded patients who were not able to answer the questionnaire and to be properly examined and observed, or those who had not accepted to participate in the study.</p>
      <p>Public patients were those admitted to the General Hospital Cl&#233;riston Andrade, which has 200 beds, 60 in the Emergency Room, and 10 in the ICU; private patients were those admitted to the following hospitals: EMEC, with 67 beds, 6 in the ICU; S&#227;o Matheus, with 53 beds, 6 in the ICU; and UNIMED, with 64 beds, 8 in the ICU. The patients underwent a clinical examination on admission, and also answered a questionnaire about demographics, risk factors and the time span between the onset of pain and arrival at the hospital (hospital arrival time - HAT) and the time span between arrival at hospital and the use of any specific medication (arrival medication time [AMT]). Self-reported weight and height<sup>9,10</sup> were used to calculate the BMI<sup>11</sup>. Abdominal waist was measured with the patient in upright posture<sup>12</sup>, as soon as this position could be taken.</p>
      <p>The laboratory parameters were the following: blood glucose, total cholesterol and fractions, and CK-MB, all performed by enzymatic methods; the reference values of CKMB were different for private and for public hospitals. Plasma troponin measurement was excluded because it is not available in public hospitals. The electrocardiographic interpretation of AMI, according to the guidelines of the Brazilian Society of Cardiology (SBC)<sup>8</sup>, was done by the researcher and collaborators.</p>
      <p>After inclusion, the patients were followed up until hospital discharge or death. Data on evolution, including the clinical classification of Killip-Kimbal<sup>13</sup>, and the use of medications were obtained from the clinical file, with additional clarification from the attending physician. The sample consisted of patients with confirmed AMI, who were consecutively admitted to the private hospitals and the reference public hospital of Feira de Santana, from March 2006 to January 2007. There was no refusal among private patients in participating in the study, but among public patients there was one refusal.</p>
      <p>The statistical analysis was based on a database created with the aid of the program SPSS, version 13.0. The data were presented comparatively between private and public patients. Initially an univariate analysis was conducted, comparing the demographic and the initial clinical profiles, as well as health care and evolution main data. Later, we conducted a comparison of primary outcomes, mortality and morbidity, the latter expressed by the percentage of patients in Killip class &gt; I. The comparison was made between the two types of hospital, using the combined and the isolated outcomes. The significance of the association between predictors and outcomes (death and Killip class &gt; I), isolated and combined, respectively, was subsequently assessed by bivariate analysis, using the variables that showed a statistically significant difference between private and public patients. Then, the independence of associations was assessed by multivariate logistic regression analysis, using the algorithm "backward". This project was approved by the Research Ethics Committee of the Bahia Foundation for the Development of Sciences (FBDC). </p>
      <p>
        <bold>Results</bold>
      </p>
      <p>150 patients were evaluated, 63 (42.0%) private, 40 (63.1%) male, aged 61.1 &#177; 13.8 years; and 87 (58.0%) public, 54 (62.1%) male, aged 60.0 &#177; 11.6 years. The demographics (<xref ref-type="table" rid="en_a06tab01-body3">Table 1</xref>) show significant differences in family income, with 19.0% of the private patients in the range of 1-2 minimum wages <italic>versus</italic> 70.0% of the public patients; and 43.0% in the range of 5-10 wages <italic>versus</italic> 4.0%, respectively (p &lt;0.001). A significant difference was found also in schooling, with 6.0% of private patients being illiterate <italic>versus</italic> 49.0% of the public patients, and 36.0% of the private patients with high school or higher education <italic>versus</italic> 3.4% of the public patients (p &lt; 0.001). </p>
      <p content-type="asset">
        <table-wrap id="en_a06tab01-body3">
          <graphic xlink:href="1678-4170-abc-93-02-0097-00006-gt01-en.jpg"/></table-wrap>
      </p>
      <p>The clinical characteristics of private and public patients were similar with respect to high prevalence of positive information on risk factors such as high blood pressure (hypertension), which was more prevalent among men (53/98 [54.1%] <italic>versus</italic> 45/98 [45.9%], p = 0.003); diabetes, which was more prevalent among women (24/41 [58.5%] <italic>versus</italic> 17/41 [41.5%], p = 0.001); smoking habit; overweight / obesity; physical inactivity; and personal history and family history of CAD. Dyslipidemia was an exception, being mentioned by 63.5% of the private patients <italic>versus</italic> 38.0% of the public patients (p = 0.002), as shown in <xref ref-type="table" rid="en_a06tab02-body3">Table 2</xref>. This similarity was also observed in the slightly higher mean values of waist circumference, BMI and blood pressure, and in a moderately high concentration of fasting plasma glucose. However, the prevalence of high total cholesterol was greater in public patients (p = 0.037). The mean CKMB values were not comparable, due to the use of techniques with different reference values, with a maximum normal value up to 25IU (international unit) in private patients, and as low as 6IU in public patients. However, using mean values, it was observed that for private patients the mean value was 3.8 times higher than the maximum reference value, while for public patients it was 15 times higher. There was no difference in the topography of AMI and in the type of ST change (<xref ref-type="table" rid="en_a06tab02-body3">Table 2</xref>).</p>
      <p content-type="asset">
        <table-wrap id="en_a06tab02-body3">
          <graphic xlink:href="1678-4170-abc-93-02-0097-00006-gt02-en.jpg"/></table-wrap>
      </p>
      <p>The clinical course of patients with AMI (<xref ref-type="table" rid="tab3-body3">Table 3</xref>) was much more favorable for private patients (81% in Killip class I <italic>vs</italic> 18.6% in class &gt; I) than for public patients (52.8% <italic>vs</italic> 47.2%; p = 0.004). The patients took longer to reach the public hospital after the onset of pain (HAT &gt; 1 hour in 76.9% <italic>vs</italic> 48.6% p = 0.003) and were treated later (AMT <underline>&gt;</underline> 15 minutes in 47.1% <italic>versus</italic> 8.0%, p &lt;0.001). 59 (94.0%) private patients were admitted to the ICU, compared to 7 (8.0%) public patients. It is noteworthy that it was among the 80 public patients with no access to the ICU that occurred 17 of the 20 deaths (85.0%) observed in the total sample. As to the administration of medication, the use of thrombolytics, clopidogrel, beta-blockers and statin was significantly more frequent in private hospitals. Only heparin was used more frequently in the public hospital than in private hospitals (69.0% <italic>versus</italic> 46.0%, p = 0.013), noting that enoxparin was used in private hospitals and non-fractioned heparin was used in the public hospital. The absence of significant differences between genders in the distribution of these variables was noticeable.</p>
      <table-wrap id="tab3-body3">
        <graphic xlink:href="1678-4170-abc-93-02-0097-00006-gt03-en.jpg"/></table-wrap>
      <p>As to the use thrombolytics, 101 (67.3%) patients were eligible for treatment (AMI with elevation of ST segment, <xref ref-type="table" rid="en_a06tab02-body3">Table 2</xref>). Among these, 17/101 (16.8%) lost their window of 12 hours for the application of thrombolytics: one private patient and 16 public patients. However, of the remaining 84 patients (42 private and 42 public), only about half (49.5%) were treated: 34/42 (81.0%) private and 16/42 (38.1%) public, p &lt;0.001. The remaining 34 (40.5%) were not treated due to health care problems: 26 (76.5%) of these were public patients.</p>
      <p>The mortality rate from AMI was 5.7 times higher among public patients than among private patients (17 [19.5%] <italic>versus</italic> 3 [4.8%], p = 0.001, <xref ref-type="table" rid="en_a06tab04-body3">Table 4</xref>), and mortality was predominant in women (12/56 [21.4%] <italic>versus</italic> 08/94 [8.5%], p = 0.028), with a prevalence ratio (PR) of 2.9. All deaths occurred in the group of patients in Killip class&gt; I. The three deaths in the private hospitals were caused by cardiogenic shock, refractory left ventricular failure and AMI during the hemodialysis session, respectively. The deaths in the public hospital included 3 from sudden death, just a few hours after admission, 2 from ventricular arrhythmia, 4 from cardiogenic shock and 8 from left ventricular failure.</p>
      <p content-type="asset">
        <table-wrap id="en_a06tab04-body3">
          <graphic xlink:href="1678-4170-abc-93-02-0097-00006-gt04-en.jpg"/></table-wrap>
      </p>
      <p>The morbidity of AMI, with a rating based on the percentage of non-fatal AMI in Killip class&gt; I was also 2.7 times higher among public patients (24/70 [34.3%] <italic>vs</italic> 9 / 60 [15.0%], p = 0.012, <xref ref-type="table" rid="en_a06tab04-body3">Table 4</xref>). Regarding gender there was also significant difference: 22/33(66.7%) in men <italic>versus</italic> 11/33(33.3%) in women, p=0.014. As to the combined mortality and morbidity outcome, the difference between public and private remained significant (47.1% <italic>versus</italic> 19.0%, p &lt;0.001).</p>
      <p>After determining the differences in demographic, clinical and evolution profiles between private and public patients, we sought to verify, by bivariate analysis, the influence of these variables in mortality and morbidity. In <xref ref-type="table" rid="tab5-body3">Table 5</xref>, it is observed that a high combined mortality and morbidity rate was significantly associated with hospitalization in a public hospital, income less than 2 minimum wages, delay in the use of specific medication (AMT), non-admission to the ICU and non-use of thrombolytic. Bivariate analysis in relation to the use of beta-blockers and statins was invalidated by the fact that most patients in both hospitals used this type of drug: 100% in private hospitals and 87 and 88% in public hospitals, respectively. However, the bivariate analysis with individual outcomes showed a significantly higher mortality without the use of beta-blocker (54.5% <italic>versus</italic> 10.1%, p &lt;0.001). As to the use of statins, both morbidity and mortality were higher for non-use of the drug or medication, with a mortality rate of 40.0% <italic>versus</italic> 11.4% (p = 0.01) and a morbidity rate of 66.7% <italic>versus</italic> 23.4%, p = 0.017, respectively. It is also noteworthy that the isolated mortality outcome was significantly higher among women (21.4% <italic>versus</italic> 8.5% for men, p &lt;0.001) and it tended to be higher among illiterate patients (21.3% <italic>versus</italic> 9.7%, p = 0.053). Regarding morbidity, it was more common among men aged <underline>&gt;</underline> 55 years (35.3% <italic>versus</italic> 11.4%, p = 0.013).</p>
      <table-wrap id="tab5-body3">
        <graphic xlink:href="1678-4170-abc-93-02-0097-00006-gt05-en.jpg"/></table-wrap>
      <p>The multivariate logistic regression analysis was completed with three variables in the model: two independent ones, arrival medication time span (AMT) <underline>&gt;</underline> 15 minutes, with OR of 2.95 (95% CI 1.38-6.31, p = 0.005), and income less than 2 minimum wages, with OR of 2.92 (95% CI 1.37-6.23, p = 0.06), and the third one, the non-use of thrombolytic, in a threshold position, with OR of 2.35 (95% CI 0.998-5.52, p = 0.050).</p>
      <p>
        <bold>Discussion </bold>
      </p>
      <p>In this comparative study of mortality and morbidity of patients with AMI in private and public hospitals, in Feira de Santana, the great preponderance of public patients require review and reflection. While the mortality in private hospitals was markedly low (4.8%), comparable to that of countries with per capita income exceeding $ 9,000.00<sup>12</sup>, mortality in the public hospital (19.5%) was well above the rate of 12.1% observed in countries with low per capita income (US$ &lt;2,900.00)<sup>12</sup>, the rate of 12.6% observed in public hospitals of the city of Niter&#243;i<sup>4</sup>, Rio de Janeiro State, and the rate of 14.5% observed in a study conducted in Salvador<sup>5</sup>, which included the six main private and public hospitals, respectively.</p>
      <p>In addition to the individual biological characteristics, which determine the degree of severity of coronary heart disease, there are several other factors contributing to the severity of AMI, with direct reflection on in-hospital mortality and morbidity. Among these are the classic risk factors: hypertension, diabetes, overweight/obesity, dyslipidemia and smoking habit, and also adverse socioeconomic conditions, delay in arrival at the hospital and lower quality of hospital care<sup>6 ,7,12-15</sup>. In this study, the binomial low family income and low education influenced the higher mortality and morbidity in public patients with AMI<sup>6,7,13</sup>. Both these factors restrict the access and adherence to treatment of causal risk factors, allowing the occurrence of a coronary event of greater severity. This statement is consistent with the equitable distribution of the major risk factors for AMI among private and public patients<sup>13,14</sup>, although more aggressively in public patients, in whom the limited possibility of appropriate control is one of the main constraints. The greater clinical severity of public patients is characterized by a high prevalence of patients in Killip class &gt; I, which is 3 or 4 times higher than that found in private patients, and a higher value of CK in public patients. These indications of major losses of viable myocardium are in line with the significant higher mortality observed in public patients, with 70% of them dying from cardiogenic shock or refractory left ventricular failure.</p>
      <p>In this scenario of greater severity of AMI in public patients, it is important to consider possible predictors among the demographic, clinical, laboratory, evolution, and therapeutical variables that showed significant differences between private and public patients and a significant association with morbidity and mortality (<xref ref-type="table" rid="tab5-body3">Table 5</xref>). The preponderance of female mortality was particularly striking, and it occurred at the expense of a high mortality rate in the public hospital network, 10 of a total of 12 female deaths, which represented 58.8% of deaths among public patients. This finding is independent of age, suggesting a greater tendency to premature mortality from AMI, in opposition to the biological curve of CAD mortality in women, which tends to increase, equaling the curve for men after menopause<sup>16</sup>. Another aspect to be considered was the preponderance of significant history of diabetes in women, a factor that is associated with an increased CAD mortality<sup>17</sup>. However, this does not explain the increased mortality of female patients in public hospitals, as the percentage of diabetic women did not differ among private and public patients.</p>
      <p>The more severe clinical conditions of public patients due to constraints arising from the health care performance remain to be assessed. Thus, there was a significant association of mortality and morbidity with the time span between arrival at the hospital and medical care (AMT) <underline>&gt;</underline> 15 minutes, highly prevalent in public patients. This delay may have favored the extension of myocardial damage, especially if combined, as it happened, with two other important factors: restricted use of thrombolytic treatment and non-admission to the ICU (<xref ref-type="table" rid="tab5-body3">Table 5</xref>).</p>
      <p>As to the use of thrombolytics, there were obvious problems in the public health care system, as only 38.1% (16/42) of the eligible patients with a satisfactory time window were properly treated, as opposed to 81.0% (34/42) in private hospitals. The non-use of thrombolytics in 26 eligible patients deserves consideration, and the most likely reasons were the lack of proper training in the use of the drug or its unavailability, both unjustifiable. It is noteworthy that 14 of the 17 deaths occurred among eligible public patients who did not receive thrombolytics. The limited number of beds in the ICU, which curbed the access to this type of treatment for 70% of AMI patients and changed the natural history of in-hospital AMI, shows another serious problem of health care management in the public network, which demands an immediate solution.</p>
      <p>Also noteworthy is the fact that drugs such as beta-blockers, statins and clopidogrel, which have positive impact on morbidity and mortality from AMI, were used in 100% of the private patients and in a significantly lower percentage of the public patients, although in the range of 87, 88 and 85%, respectively<sup>15</sup>. In the context of these serious health care problems, it is important to note that there was no significant difference in the restrictions between men and women, which does not explain the higher female mortality.</p>
      <p>In this study, factors such as a salary of less than two minimum wages and a time span to receive specific cardiovascular medication <underline>&gt;</underline> 15 minutes were independent predictors of mortality and morbidity from AMI. Thirdly comes the non-use of thrombolytics, whose odds ratio showed a threshold statistical significance, but its clinical significance is an actual fact. These three variables represent, in context, all other variables that were calculated by bivariate analysis, and, as already discussed, those which had an influence in the primary outcome of this study: increased mortality and morbidity from AMI in a public hospital of Feira de Santana. The socioeconomic status variable, in turn, represents the social inequality, which does not create conditions for appropriate health care, affecting the more serious cases of a pathology, and that does not allow the patients to choose the place where they will receive treatment. The second and third are representative of the shortcomings of the public health care system in general, which is unsatisfactory, starting on arrival at the hospital, which has overcrowded emergency units and personnel with inadequate training, and culminating with the inability to offer the intensive care treatment required by the disease in its acute phase. It is noteworthy that although admittance to a public hospital and restriction of treatment in the ICU have not appeared as independent variables in the final model of the logistic regression analysis, and the non-use of thrombolytics has not reached the level of significance that was compatible with its clinical importance, this does not diminish the value of these findings. In the multivariate logistic model, the degree of influence of these variables in relation to the outcome is analyzed in combination with the others, highlighting those whose performance is independent from the others. As to admittance to public hospitals and treatment in the ICU as risk variables, they do not survive in the presence of others that are directly related to the health care assistance, such as the delay in the administration of specialized care and the quality of treatment represented by the use of thrombolytics.</p>
      <p>These findings are disturbing and indicate, in the scenario of this study, that low socioeconomic status is the greatest risk factor for AMI morbidity and mortality, from the conditioning of a more severe coronary artery disease to a precarious assistance, which is contrary to the basic standards in the treatment of the disease<sup>2</sup>. The fact that public patients were represented by a sole hospital in the second largest city in the state of Bahia, with 600,000 inhabitants, exposes even more clearly, the seriousness of the situation and the need for an urgent and efficient recasting of the health care for heart patients, in the state. Since the number of cardiovascular disease patients is growing in developing countries<sup>1</sup>, a strategic plan is needed, with the deployment of a health care network that begins in primary care and culminates in the tertiary network, distributed in an appropriate manner. The diversity of basic conditions, in infrastructure and human resources, requires, for an efficient assessment of CAD patients, the use of computer technology capable of bringing to health care units a flexible and rapid solution to a variety of problems in diagnosis, treatment and prevention. The existing infrastructure, the SAMU and the PSF, can be very useful, if properly organized in its operation and availability of skilled human resources. However, the central figure of a Public Service of Cardiology in charge of that network is essential.</p>
      <p>This study shows the importance of research in the evaluation of institutional performance in the fulfillment of their goals, indicating with scientific data which are the major operational problems to be solved. The study had the merit of confirming the hypothesis that the mortality and morbidity from AMI in the city of Feira de Santana were demonstrably higher in patients admitted to public hospitals, when compared to those admitted to private hospitals, indicating the main predictors of this fact. This study was not designed to identify the operational causes involved, which should be sought with other types of research, which, however, represent a fundamental step to be taken.</p>
      <p>It is also noteworthy that the results found in Feira de Santana certainly apply to many public welfare institutions in Brazil, although they should not be generalized. As an example, there were similar results in a study conducted in the city of Niteroi, Rio de Janeiro<sup>15</sup>. The study involved 241 patients with AMI, selected from three public hospitals (159) and two private hospitals (82), with mortality rates of 12.6% and 12.3% respectively. In Feira de Santana, the mortality rate in public hospitals was 35.4% higher, and the mortality rate in private hospitals was 64.3% lower, and these findings are also relevant. In the comparison of mortality in the private network, emphasizing the difference in the treatment strategy is important: 68.3% of the patients in Niter&#243;i underwent invasive procedures (angioplasty in 46.3% and bypass graft surgery in 23.2%), compared to none of the patients in Feira de Santana. However, in the private hospital network of Feira de Santana, 87.2% of the eligible patients receive thrombolytics, as opposed to 10% of the eligible patients in the private hospital network of Niteroi. In public hospitals, the corresponding percentages were 31.0% in Feira de Santana and 38.8% in Niter&#243;i, both low<sup>18-20</sup>.</p>
      <p>
        <bold>Final remarks</bold>
      </p>
      <p>From the aforementioned, it is evident that urgent measures need to be taken by health authorities to monitor the mortality and morbidity of cardiovascular diseases in public hospitals of the SUS, in a regular basis; this would ensure that their operation meets the basic guideline recommendations of the Brazilian Society of Cardiology, with the purpose of making sure that the rates of mortality and morbidity are not influenced, in any significant way, by operational institutional failures. Furthermore, a recasting of the cardiovascular public health care system is needed at national level, with the integration of primary, secondary and tertiary health care levels, in order to lower the prevalence and incidence of these diseases and to improve the efficiency of prevention and treatment procedures.</p>
      <p>
        <bold>Potential Conflict of Interest</bold>
      </p>
      <p>No potential conflict of interest relevant to this article was reported.</p>
      <p>
        <bold>Sources of Funding</bold>
      </p>
      <p>There were no external funding sources for this study.</p>
      <p>
        <bold>Study Association</bold>
      </p>
      <p>This article is part of the thesis of Master submitted by Gra&#231;a Maria Tavares de Melo Ferreira, from <italic>Funda&#231;&#227;o Bahiana para o Desenvolvimento das Ci&#234;ncias, Escola Bahiana de Medicina e Sa&#250;de P&#250;blica, Funda&#231;&#227;o Oswaldo Cruz</italic>/FIOCRUZ.</p>
      <p>
        <bold>References</bold>
      </p>
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