Résumé :
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[BDSP. Notice produite par INIST 32R0xs7t. Diffusion soumise à autorisation]. Background. The purpose of this study was to analyse misclassification of height, weight and body mass index (BMI), derived from mail questionnaires, and its dependency on socioeconomic factors. Methods. A random sample of 4442 adults aged 18-84 years, living in Stockholm county, Sweden, were in 1984-1985 asked about their height and weight. A few months later 3208 of these adults participated in a health examination that included measures of height and weight. In this study we have used occupational class as the socioeconomic indicator. We have used sensitivity as a measure of misclassification of height, weight and BMI. Results. The difference in mean measured height between socioeconomic groups I and III was 2.7 cm for men and 2.0 cm for women. The mean difference in measured height between socioeconomic groups I and III was higher for men than for women in all age groups. The mean difference between self-reported and measured height was 0.6 cm for men and 0.79 cm for women. For weight, the corresponding difference was - 0.74 kg for men and - 1.64 kg for women. Women's BMI was more underestimated than men's (-0.85 for women, - 0.40 for men). When using self-reported height and weight for calculating BMI, 81% of the men and 78% of the women were classified correctly, but only 61% of the obese men and 55% of the obese women were identified. The BMI was underestimated in all socioeconomic groups. (...)
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