HIGH TEMPORAL, GEOGRAPHIC, AND INCOME VARIATION IN BODY-MASS INDEX AMONG ADULTS IN BRAZIL

Objectives, Population-based data on body mass index for developing co untries are scarce. Body mass index data from two Brazilian surveys we re examined to determine regional and temporal variations in the preva lences of underweight, overweight, and obesity. Methods. Nationwide su rveys in 1974/75 and 1989 collected anthropometric data in Brazil from 55 000 and 14 455 households, respectively. Trained interviewers used the same methods to measure weight and stature in both surveys, and s urvey designs were identical. Prevalences of underweight, overweight, and obesity were determined for persons 18 years of age and older. Res ults. In the 1989 survey, body mass index varied greatly according to region of the country, urbanization, and income. Tn the wealthier Sout h, the prevalence of overweight/ obesity was the highest and the preva lence of underweight was the lowest; in the poorer rural Northeast, th ese patterns were reversed. For both surveys, overweight/obesity was m ore common among women than among men and peaked at age 45 to 64 years in both sexes. Over the 15 years between surveys, the prevalence of b oth overweight and obesity increased strikingly. Conclusions. In contr ast to findings in developed countries, obesity in Brazil was positive ly associated with income and was much more prevalent among women than among men. For Brazilian women, the overall prevalence of overweight was nearly as high as that among women in the United States.