Cross-cultural adaptation and validation of the Brazilian Portuguese version of the Edinburgh Claudication Questionnaire

OBJECTIVE: Translation, cultural adaptation and validation of the Brazilian Portuguese version of the Edinburgh Claudication Questionnaire (ECQ) a specific tool to assess intermittent claudication. METHODS: The Brazilian Portuguese version of the ECQ was developed after authorization by the University of Edinburgh. It was applied to 217 individuals: São Paulo Capital District residents with complaints of leg pain. Individuals under research were invited through mass communication media to participate in the I Campaign to Fight Peripheral Arterial Disease (PAD). In stage 1, participants filled out the ECQ and another questionnaire on risk factors and cardiovascular history. In stage 2, participants had anthropometric measures and ankle-brachial index (ABI) at rest measured by vascular Doppler. In case of doubt, vascular treadmill test was applied (VTT). PAD condition was defined by ABI 65 years) and non-elderly subjects. CONCLUSION: The Brazilian Portuguese version of the Edinburgh claudication questionnaire maintained good sensitivity and specificity and can be recommended for screening of PAD in clinical practice and epidemiological research in Brazil.