Racial discrimination predicts the increase in body weight and BMI in Black individuals from ELSA-Brasil cohort /Discriminacao racial prediz o aumento do peso corporal e do IMC em individuos pretos da coorte ELSA-Brasil

We investigated whether racial discrimination accelerates the weight and Body Mass Index (BMI) gain in Blacks and Browns participants of the Brazilian Longitudinal Study of Adult Health (ELSA-Brasil) in four years of follow-up. We compared body weight and BMI between the 1st (2008-2010) and 2nd visit (2012-2014) of 5,983 Blacks and Browns participants. Exposure to racial discrimination and covariates (age, sex, education, and research center) were obtained at the 1st visit. Linear mixed effects models stratified by race/skin color were used. Report of racial discrimination was more frequent among Blacks (32.1%) than Browns (6.3%). During the follow-up period, Blacks and Browns gained an average of 1.4kg and 1.2kg, respectively. This increase was greater among those who reported discrimination when compared to those who did not, both in Blacks (2.1kg vs.1.0kg, p < 0.001) and Browns (1.9kg vs. 1.1kg, p < 0.05). The results of the interaction between racial discrimination and time showed that Blacks, but not Browns, who reported racial discrimination had greater weight and BMI gains between visits. Our results suggest that reducing racial discrimination would contribute to prevent and/or control obesity increase in the country. Key words Racial discrimination, Racism, Weight gain, Cohort studies Investigou-se se a discriminacao racial acelera o ganho de peso corporal e o Indice de Massa Corporal (IMC) em pretos e pardos participates do Estudo Longitudinal de Saude do Adulto (ELSA-Brasil) em quatro anos de seguimento. Comparou-se o peso corporal e o IMC entre a [1.sub.a] (2008-2010) e a [2.sub.a] visita (2012-2014) de 5.983 participantespretos epardos. A exposicao a discriminacao racial e as covariaveis (idade, sexo, escolaridade e centro de pesquisa) foram obtidas na [1.sub.a] visita. Foram utilizados modelos lineares de efeitos mistos estratificados por raca/cor da pele. O relato de discriminacao racial foi mais frequente entre pretos (32,1%) do que em pardos (6,3%). Durante o periodo de acompanhamento, pretos e pardos ganharam uma media de 1,4 kg e 1,2 kg, respectivamente. Esse aumento foi maior entre os que relataram discriminacao, quando comparados aos que nao relataram, tanto em pretos (2,1 kg vs. 1,0 kg p < 0,001) quanto em pardos (1,9 kg vs. 1,1 kg p < 0,05). Apos ajustes, os pretos, mas nao os pardos, que relataram discriminacao racial apresentaram maiores ganhos de peso e IMC entre as visitas. Nossos resultados sugerem que a reducao da discriminacao