[PP.13.04] TRENDS IN OVERWEIGHT/OBESITY IN BRAZILIAN STUDENTS OF PUBLIC SCHOOLS

Objective: To compare prevalence rates of overweight/obesity (O/O) in two populations of students 10–15 years old (yo) from public schools, with an interval of 30 years. Design and method: Two cross-sectional studies were developed: the Rio de Janeiro Study I (RJS I) in 1986–87 (n = 3,456, 1,704 M/1,752F) and the Rio de Janeiro Study II (RJS II) in 2015–16 (n = 1,892, 838 M/1,054F). students were evaluated at their schools in the same geographical area, and height (H), weight (W) and body mass index (BMI) were obtained. O/O was defined when BMI> = p85 for age and gender. Height percentiles were calculated. Results: Population distribution by gender and age was not different, but skin color distribution was different between the two evaluations (whites 62,6% × 44,1%, blacks 15,5% × 22,5%, not black/not white 21,8% × 33,3% in RJS I and RJS II, respectively, p < 0.0001). In RJS II, 30 years later, both genders presented higher means of weight and BMI for all ages (p < 0.005), except for boys and girls 10yo and for girls 13yo, and higher means of height (p < 0.04), except for boys 10yo and boys and girls 15yo. Distribution of height percentiles was significantly different between the two evaluations with higher prevalence of p75, p90 e 95 in RJS II (p < 0.0001). The comparison of the nutritional status (NS) among the populations of RJS I and RJS II showed an increase in the prevalence of O/O from 31.9% to 45.2% with higher increase of obesity (10.3% × 22.2%) than that of overweight (21.6% × 23.0%) in RJS II, after 30 years, while the prevalence of low weight (2.8%x2.5%) and eutrophy (65.3% × 52.2%) were lower in RJS II (p < 0.0001). These differences were statistically significant in all age groups and in both genders (p < 0.05), except for boys 14yo and girls 10yo. Conclusions: In 30 years, the prevalence of overweight/obesity in Brazilian adolescents 10–15yo increased in both genders and in all age groups, mainly obesity rates, representing an important cardiovascular risk factor in adolescents, and indicating the need of adoption of primary prevention measures since very early in life.