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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">WpxDWWrRd5TBdjzCKrp5YGB</article-id>
      <article-id pub-id-type="other">00008</article-id>
      <article-id pub-id-type="publisher-id" specific-use="scielo-v2">S0066-782X1998000200008</article-id>
      <article-id pub-id-type="publisher-id" specific-use="scielo-v1">S0066-782X(98)07000208</article-id>
      <article-id pub-id-type="doi">10.1590/S0066-782X1998000200008</article-id>
      <article-categories>
        <subj-group subj-group-type="heading">
          <subject>Artigos Originais</subject>
        </subj-group>
      </article-categories>
      <title-group>
        <article-title>Associa&#231;&#227;o entre diferentes indicadores de obesidade e preval&#234;ncia de hipertens&#227;o arterial</article-title>
        <trans-title-group xml:lang="en">
          <trans-title>The association between different measurements of obesity and the prevalence of hypertension</trans-title>
        </trans-title-group>
      </title-group>
      <contrib-group>
        <contrib contrib-type="author">
          <name>
            <surname>Gus</surname>
            <given-names>Miguel</given-names>
          </name>
        </contrib>
        <contrib contrib-type="author">
          <name>
            <surname>Moreira</surname>
            <given-names>Leila B.</given-names>
          </name>
        </contrib>
        <contrib contrib-type="author">
          <name>
            <surname>Pimentel</surname>
            <given-names>Maur&#237;cio</given-names>
          </name>
        </contrib>
        <contrib contrib-type="author">
          <name>
            <surname>Gleisener</surname>
            <given-names>Ana Luiza M.</given-names>
          </name>
        </contrib>
        <contrib contrib-type="author">
          <name>
            <surname>Moraes</surname>
            <given-names>Renan S.</given-names>
          </name>
        </contrib>
        <contrib contrib-type="author">
          <name>
            <surname>Fuchs</surname>
            <given-names>Fl&#225;vio D.</given-names>
          </name>
        </contrib>
      </contrib-group>
      <pub-date date-type="collection" publication-format="electronic">
        <month>02</month>
        <year>1998</year>
      </pub-date>
      <volume>70</volume>
      <issue>2</issue>
      <fpage>111</fpage>
      <lpage>114</lpage>
      <history>
        <date date-type="received">
          <day>23</day>
          <month>07</month>
          <year>1997</year>
        </date>
        <date date-type="accepted">
          <day>03</day>
          <month>12</month>
          <year>1997</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>OBJETIVO: Determinar a associa&#231;&#227;o entre &#237;ndice de massa corporal (IMC), &#237;ndice cintura-quadril e cintura com a preval&#234;ncia de hipertens&#227;o arterial (HAS) em amostra representativa de 1088 adultos de Porto Alegre, Brasil. M&#201;TODOS: Foram considerados hipertensos indiv&#237;duos com press&#227;o sist&#243;lica (PAS)  &gt; ou = 160mmHg ou diast&#243;lica (PAD)  &gt; ou =  95mmHg e definidos como obesos aqueles com IMC  &gt; ou = 27kg/m&#178;, ou com raz&#227;o cintura/quadril  &gt; ou = 0,95 (homens) e  &gt; ou = 0,80 (mulheres) ou com cintura  &gt; ou = 96cm (homens) e  &gt; ou = 92cm (mulheres). RESULTADOS: A obesidade aferida pelo IMC associou-se com a preval&#234;ncia de HAS em ambos sexos (RR 1,9, IC 1,0 - 3,2 masculino; RR 2,2, IC 1,3 - 3,8 feminino). Os outros &#237;ndices associaram-se, significativamente, apenas nas mulheres. CONCLUS&#195;O: IMC  &gt; ou = 27,0kg/m&#178; associou-se mais, consistentemente, com o risco de HAS. A magnitude similar das associa&#231;&#245;es dos demais indicadores demonstram sua utilidade na avalia&#231;&#227;o do risco para hipertens&#227;o.</p>
      </abstract>
      <trans-abstract xml:lang="en">
        <p>PURPOSE: To evaluate the association between body mass index (BMI), waist-hip ratio and waist circumference with the prevalence of hypertension in a representative sample of 1088 adults of Porto Alegre (RS), Brazil. METHODS: In this cross-sectional survey, subjects were considered as having hypertension if they had systolic blood pressure  &gt; or = 160mmHg or diastolic &gt; or = 90mmHg, and were considered obese if they had BMI  &gt; or = 27kg/m&#178;, or had a waist-hip-ratio  &gt; or = 0.95cm (men) or 0.80 (women) or had a waist circumference  &gt; or = 96 (men) or 92 (women). RESULTS: Obesity defined by the BMI was associated with hypertension in both genders (RR 1.9, CI 1.0 - 3.2 in men; RR 2.2, CI 1.3 - 3.8 in women). The other indices were significantly associated with hypertension just in women. CONCLUSION: BMI  &gt; or =  27.0kg/m&#178; was strongly associated with increased odds to have hypertension. Similar magnitude of the association with the other indices indicate their utility to estimate the risk of hypertension.</p>
      </trans-abstract>
      <kwd-group xml:lang="en" kwd-group-type="author-generated">
        <kwd>hypertension</kwd>
        <kwd>obesity</kwd>
        <kwd>prevalence</kwd>
      </kwd-group>
      <kwd-group xml:lang="pt" kwd-group-type="author-generated">
        <kwd>hipertens&#227;o</kwd>
        <kwd>obesidade</kwd>
        <kwd>preval&#234;ncia</kwd>
      </kwd-group>
      <pub-date publication-format="electronic" date-type="pub">
        <day>08</day>
        <month>01</month>
        <year>2002</year>
      </pub-date>
    </article-meta>
  </front>
  <body>
    <p>
      <bold>Artigo Original </bold>
    </p>
    <p>
      <bold>Associa&#231;&#227;o entre Diferentes Indicadores de Obesidade e Preval&#234;ncia de Hipertens&#227;o Arterial</bold>
    </p>
    <p>Miguel Gus, Leila B. Moreira, Maur&#237;cio Pimentel, Ana Luiza M. Gleisener, Renan S. Moraes, Fl&#225;vio D. Fuchs </p>
    <p>
      <bold>Porto Alegre, RS </bold>
    </p>
    <p><bold><italic>OBJETIVO: </italic></bold>Determinar a associa&#231;&#227;o entre &#237;ndice de massa corporal (IMC), &#237;ndice cintura-quadril e cintura com a preval&#234;ncia de hipertens&#227;o arterial (HAS) em amostra representativa de 1088 adultos de Porto Alegre, Brasil. </p>
    <p><bold><italic>M&#201;TODOS: </italic></bold><italic>Foram considerados hipertensos indiv&#237;duos com press&#227;o sist&#243;lica (PAS) </italic>&#179;<italic>160mmHg ou diast&#243;lica (PAD) </italic>&#179;<italic>95mmHg e definidos como obesos aqueles com IMC </italic>&#179;<italic>27kg/m</italic><sup><italic>2</italic></sup><italic>, ou com raz&#227;o cintura/quadril </italic>&#179;<italic>0,95 (homens) e </italic>&#179;<italic>0,80 (mulheres) ou com cintura </italic>&#179;<italic>96cm (homens) e </italic>&#179;92cm (mulheres). </p>
    <p><bold><italic>RESULTADOS: </italic></bold>A obesidade aferida pelo IMC associou-se com a preval&#234;ncia de HAS em ambos sexos (RR 1,9, IC 1,0 - 3,2 masculino; RR 2,2, IC 1,3 - 3,8 feminino). Os outros &#237;ndices associaram-se, significativamente, apenas nas mulheres. </p>
    <p><bold><italic>CONCLUS&#195;O: </italic></bold><italic>IMC </italic>&#179;<italic>27,0kg/m</italic><sup><italic>2</italic></sup><italic> associou-se mais, consistentemente, com o risco de HAS. A magnitude similar das associa&#231;&#245;es dos demais indicadores demonstram sua utilidade na avalia&#231;&#227;o do risco para hipertens&#227;o.</italic> </p>
    <p><bold>Palavras-chave:</bold> hipertens&#227;o, obesidade, preval&#234;ncia </p>
    <p>
      <bold>The Association between Different Measurements of Obesity and the Prevalence of Hypertension </bold>
    </p>
    <p><bold><italic>PURPOSE: </italic></bold>To evaluate the association between body mass index (BMI), waist-hip ratio and waist circumference with the prevalence of hypertension in a representative sample of 1088 adults of Porto Alegre (RS), Brazil. </p>
    <p><bold><italic>METHODS: </italic></bold><italic>In this cross-sectional survey, subjects were considered as having hypertension if they had systolic blood pressure </italic>&#179;<italic>160mmHg or diastolic</italic>&#179;<italic>90mmHg, and were considered obese if they had BMI </italic>&#179;<italic>27kg/m</italic><sup><italic>2</italic></sup><italic>, or had a waist-hip-ratio </italic>&#179;<italic>0.95cm (men) or 0.80 (women) or had a waist circumference </italic>&#179;96 (men) or 92 (women). </p>
    <p><bold><italic>RESULTS: </italic></bold>Obesity defined by the BMI was associated with hypertension in both genders (RR 1.9, CI 1.0 - 3.2 in men; RR 2.2, CI 1.3 - 3.8 in women). The other indices were significantly associated with hypertension just in women. </p>
    <p><bold><italic>CONCLUSION: </italic></bold><italic>BMI </italic>&#179;<italic> 27.0kg/m</italic><sup><italic>2</italic></sup><italic> was strongly associated with increased odds to have hypertension. Similar magnitude of the association with the other indices indicate their utility to estimate the risk of hypertension.</italic> </p>
    <p><bold>Key-words:</bold> hypertension, obesity, prevalence </p>
    <p>A obesidade &#233; um fator de risco independente para hipertens&#227;o arterial sist&#234;mica (HAS) <sup>1,2, 3</sup> e para mortalidade, especialmente em mulheres <sup>5,6</sup>. Dieta hipocal&#243;rica tem sido considerada uma medida eficaz <sup>4</sup> e efetiva <sup>6</sup> no manejo da HAS. </p>
    <p>O &#237;ndice de massa corporal (IMC) e a raz&#227;o cintura-quadril s&#227;o as medidas antropom&#233;tricas mais comumente utilizadas para a determina&#231;&#227;o do excesso de peso, estando, ainda, associadas a outros fatores de risco cardiovasculares, como hipercolesterolemia, baixos n&#237;veis de lipoprote&#237;na de alta densidade (HDL) e resist&#234;ncia insul&#237;nica <sup>8</sup> . </p>
    <p>Diversos &#237;ndices antropom&#233;tricos t&#234;m sido propostos para determinar a associa&#231;&#227;o entre excesso de peso e fatores de risco cardiovasculares. A medida da cintura, um dado de f&#225;cil e r&#225;pida obten&#231;&#227;o, associa-se tanto com o IMC como com a raz&#227;o cintura-quadril, sendo capaz de detectar indiv&#237;duos com excesso de peso e outros fatores de risco cardiovascular com alta acur&#225;cia <sup>9-11</sup> . A medida da cintura tamb&#233;m est&#225; relacionada com a gordura intra-abdominal e j&#225; foi sugerida como o &#237;ndice antropom&#233;trico capaz de prever o risco cardiovascular <sup>12</sup>. </p>
    <p>O presente trabalho tem o objetivo de detectar qual o &#237;ndice antropom&#233;trico que se associa mais significativamente com a preval&#234;ncia de HAS e em qual deles um aumento importante estaria relacionado a maior preval&#234;ncia de HAS, em uma amostra de indiv&#237;duos adultos n&#227;o selecionados por doen&#231;a e representativa da popula&#231;&#227;o de Porto Alegre. </p>
    <p>M&#233;todos </p>
    <p>Selecionaram-se 1088 indiv&#237;duos com idade m&#237;nima de 18 anos atrav&#233;s de processo de amostragem aleat&#243;ria proporcional por est&#225;gios m&#250;ltiplos e conglomerados. Os dados foram coletados em visita domiciliar por entrevistadores treinados para a aplica&#231;&#227;o de um question&#225;rio padronizado e aferi&#231;&#227;o dos par&#226;metros f&#237;sicos, incluindo a press&#227;o arterial (PA). A descri&#231;&#227;o completa da amostragem e da coleta dos dados j&#225; foi publicada <sup>2,12,14</sup>. </p>
    <p>A PA foi aferida com man&#244;metros aner&#243;ides, periodicamente calibrados, contra man&#244;metros de merc&#250;rio e seguindo as orienta&#231;&#245;es do <italic>Joint National Committee</italic> <sup>15</sup>. Considerou-se o 1<sup><underline>o</underline></sup> som de Korotkoff como a press&#227;o arterial sist&#243;lica (PAS) e o 5<sup><underline>o</underline></sup> como press&#227;o arterial diast&#243;lica (PAD). Para efeito de an&#225;lise foi considerada a m&#233;dia de duas aferi&#231;&#245;es, com corre&#231;&#227;o para o per&#237;metro braquial, segundo as f&#243;rmulas propostas por Maxwell <sup>16</sup>: PAS = sist&#243;lica aferida + [32-(1,05 x per&#237;metro braquial)] e PAD = diast&#243;lica aferida + [22-(0,72 x per&#237;metro braquial)]. </p>
    <p>Verificou-se o peso corporal dos indiv&#237;duos vestindo roupas leves e descal&#231;os utilizando-se balan&#231;as port&#225;teis com precis&#227;o de 0,1kg. Aferiram-se a altura, a circunfer&#234;ncia braquial, a cintura e quadril com fita m&#233;trica e a altura com trenas. </p>
    <p>Calculou-se IMC como peso dividido pela altura ao quadrado (kg/m<sup>2</sup>). A medida da cintura foi realizada na por&#231;&#227;o de menor circunfer&#234;ncia entre o gradil costal e a crista il&#237;aca e a medida do quadril ao n&#237;vel dos grandes troc&#226;nteres. </p>
    <p>Utilizando-se como padr&#227;o ouro para determina&#231;&#227;o do excesso de peso um IMC &#179;27kg/m<sup>2 </sup>determinou-se atrav&#233;s de curva ROC (<italic>receiver operating</italic> <italic>characteristics</italic>) <sup>11</sup> o ponto de corte da medida da cintura em 96cm para homens e 92cm para mulheres, como indicadores de excesso de peso. Com base em outros estudos <sup>8,9</sup>, estabeleceu-se o ponto de corte para a raz&#227;o cintura-quadril em 0,95 para homens e 0,80 para mulheres. </p>
    <p>Consideraram-se hipertensos os indiv&#237;duos com PAS &#179;160mmHg e/ou PAD &#179;95mmHg <sup>17</sup>, tomando-se a m&#233;dia de duas aferi&#231;&#245;es corrigidas pelo per&#237;metro braquial <sup>16</sup>. </p>
    <p>A associa&#231;&#227;o entre os diferentes &#237;ndices antropom&#233;tricos e a preval&#234;ncia de HAS foi analisada atrav&#233;s de regress&#227;o log&#237;stica. As vari&#225;veis de controle foram idade, hist&#243;ria familiar de hipertens&#227;o (ambos os pais hipertensos), abuso de &#225;lcool (consumo &#179;30g) e alcance escolar. </p>
    <p>Os c&#225;lculos estat&#237;sticos foram realizados utilizando-se o programa SPSS <sup>16</sup>. </p>
    <p>Resultados </p>
    <p>A m&#233;dia de idade, IMC e raz&#227;o cintura-quadril e a preval&#234;ncia de HAS foram similares para homens e mulheres. A cintura foi significativamente maior nos homens (<xref ref-type="table" rid="tabela1">tab. I</xref>). Os homens apresentaram PAS maior do que as mulheres, assim como maior preval&#234;ncia de abuso de &#225;lcool e maior freq&#252;&#234;ncia de escolaridade &lt;5 anos, vari&#225;veis que nesta amostra associaram-se, de maneira independente, com a preval&#234;ncia de HAS <sup>2</sup>. </p>
    <table-wrap id="tabela1">
      <graphic xlink:href="1678-4170-abc-70-02-0111-00008-gt01.jpg"/></table-wrap>
    <p>A <xref ref-type="table" rid="tabela2">tabela II</xref> e <xref ref-type="undefined" rid="tabela3">III</xref> mostram as m&#233;dias das PAS e PAD, preval&#234;ncia de HAS e peso entre homens e mulheres com e sem excesso de peso definido pelos diferentes &#237;ndices antropom&#233;tricos. A PAS e a preval&#234;ncia de HAS foram mais elevadas entre os homens com excesso de peso determinado por qualquer um dos &#237;ndices antropom&#233;tricos. A PAD foi significativamente mais elevada apenas entre os indiv&#237;duos com excesso de peso definido pelo IMC. Entre as mulheres, a PAS, PAD e a preval&#234;ncia de HAS foram significativamente mais elevadas entre as com excesso de peso, determinado por qualquer um dos &#237;ndices antropom&#233;tricos. </p>
    <table-wrap id="tabela2">
      <graphic xlink:href="1678-4170-abc-70-02-0111-00008-gt02.jpg"/></table-wrap>
    <p>
      <undefined id="tabela3"/>
    </p>
    <p>
      <graphic xlink:href="1678-4170-abc-70-02-0111-00008-e01.jpg"/></p>
    <p>Os riscos relativos estimados de HAS, ajustados para idade, hist&#243;ria familiar de hipertens&#227;o, abuso de &#225;lcool e escolaridade s&#227;o apresentados na <xref ref-type="table" rid="tabela4">tabela IV</xref>. O excesso de peso definido por IMC &#179;27kg/m<sup>2</sup> apresentou associa&#231;&#227;o estatisticamente significativa com a preval&#234;ncia de HAS, tanto em homens (1,9 IC 1,0-3,2) como em mulheres (2,2 IC 1,3-3,8). A medida da cintura e a raz&#227;o cintura-quadril apresentaram associa&#231;&#227;o estatisticamente significativa apenas entre as mulheres (2,3 IC 1,3-4,1 e 2,2 IC 1,1-3,6, respectivamente). </p>
    <table-wrap id="tabela4">
      <graphic xlink:href="1678-4170-abc-70-02-0111-00008-gt03.jpg"/></table-wrap>
    <p>Discuss&#227;o </p>
    <p>Os primeiros estudos sobre a composi&#231;&#227;o corporal e distribui&#231;&#227;o da gordura corporal para identificar indiv&#237;duos com um risco maior para doen&#231;a cardiovascular e diabetes mellitus tipo II utilizaram, principalmente, o IMC e a raz&#227;o cintura-quadril <sup>19, 20</sup>. A medida da cintura &#233; um &#237;ndice antropom&#233;trico de f&#225;cil e r&#225;pida aferi&#231;&#227;o, dispensando a necessidade do emprego de f&#243;rmulas e c&#225;lculos. </p>
    <p>Han e col <sup>10,11</sup> demonstraram, em estudo transversal e de base populacional, que a medida da cintura &#233; capaz de identificar com alta acur&#225;cia indiv&#237;duos obesos. Estes autores identificaram que circunfer&#234;ncias &#179;94cm em homens e &#179;80cm em mulheres s&#227;o capazes de identificar indiv&#237;duos com IMC &#179;25kg/m<sup>2 </sup>com uma sensibilidade e especificidade de 96%. Al&#233;m disto verificaram uma associa&#231;&#227;o significativa entre a medida de cintura acima destes valores e a preval&#234;ncia de hipertens&#227;o e outros fatores de risco, tanto em homens quanto em mulheres. </p>
    <p>No presente estudo, igualmente, foi identificada uma associa&#231;&#227;o positiva entre os diferentes &#237;ndices antropom&#233;tricos indicadores de obesidade e a preval&#234;ncia de hipertens&#227;o. Em rela&#231;&#227;o &#224; cintura, as diferen&#231;as nos valores do risco relativo estimado no estudo de Han e col <sup>10,11</sup> para o estudo atual (1,9 vs 1,7 e 1,8 vs 2,3 para homens e mulheres, respectivamente) poderiam ser explicadas pelas diferen&#231;as nos pontos de corte ou caracter&#237;sticas da popula&#231;&#227;o. </p>
    <p>No modelo de regress&#227;o log&#237;stica do presente estudo, o IMC foi o indicador de obesidade com associa&#231;&#227;o mais consistente com a preval&#234;ncia de hipertens&#227;o, tanto em homens como em mulheres, representando um risco duas vezes maior para valores maiores ou iguais a 27kg/m<sup>2</sup>. </p>
    <p>A import&#226;ncia do IMC como indicador de excesso de peso j&#225; foi demonstrada em estudos de coorte <sup>5,6</sup> que avaliaram a rela&#231;&#227;o entre mortalidade e obesidade. Nesses trabalhos foi demonstrado um aumento da mortalidade total associado a um IMC &gt;27kg/m<sup>2</sup>. Devido a isto, escolheu-se valor diferentemente do valor de 25kg/m<sup>2 </sup>adotado no estudo de Han e col <sup>10</sup> no momento da identifica&#231;&#227;o dos pontos de corte para a defini&#231;&#227;o de obesidade, a partir da medida da cintura. </p>
    <p>Embora n&#227;o atingissem signific&#226;ncia estat&#237;stica, entre os homens, os resultados obtidos para os demais indicadores de obesidade s&#227;o coerentes, mostrando riscos relativos estimados de magnitudes semelhantes, o que sugere que a cintura possa ser utilizada em substitui&#231;&#227;o ao IMC, inclusive para os homens. A raz&#227;o cintura-quadril demonstrou associa&#231;&#227;o praticamente semelhante ao IMC. </p>
    <p>Este trabalho permite concluir que em uma amostra populacional de adultos, representativa da cidade de Porto Alegre, a medida de cintura &#179;96cm para homens e &#179;92cm para mulheres associa-se, significativamente, &#224; obesidade definida como IMC &#179;27kg/m<sup>2</sup>.O &#237;ndice antropom&#233;trico que se associou mais consistentemente com a preval&#234;ncia de HAS foi o IMC, mas a intensidade similar da associa&#231;&#227;o entre o &#237;ndice cintura/quadril e medida isolada da cintura demonstram que estes &#237;ndices podem ser utilizados como op&#231;&#227;o durante a avalia&#231;&#227;o do risco de hipertens&#227;o e na avalia&#231;&#227;o de indiv&#237;duos hipertensos. </p>
    <p>Unidade de Farmacologia Cl&#237;nica do Hospital de Cl&#237;nicas de Porto Alegre e Depto de Farmacologia, Universidade Federal do Rio Grande do Sul </p>
    <p> Correspond&#234;ncia: Miguel Gus - Rua Padre Chagas, 25 - 90570-080 - Porto Alegre, RS </p>
    <p> Recebido para publica&#231;&#227;o em 23/7/97 </p>
    <p> Aceito em 3/12/97 </p>
  </body>
  <back>
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