Abstract
Objective: to evaluate the validity of body mass index (BMI) calculated from self-reported weight and height and measured for use in anthropometric classification. Methods: validation study involving 65 adults from Salvador city, Brazil, using a telephone interview with weight and height measured in person. Paired t-test and interclass correlation coefficient (ICC) were calculated; sensitivity, specificity and positive predictive value (PPV) of self-reported BMI were estimated and verified. Results: women overestimated height by 3.15cm (p 0.05). The study showed ICC greater than 60.0% for weight, height and BMI, considering age, gender and schooling, except for male height; and accuracy for self-reported measures. The general measures of sensitivity, specificity and PPV were 92.9%, 78.4% and 76.5%, respectively. Conclusion: self-reported BMI showed to have been valid to be used on population anthropometric classification and monitoring.
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