Objectives: To identify the sociodemographic and behavioral determinants of obesity among Brazilian adults. Methodology: Crosssectional study, based on secondary data from the Surveillance System of Risk Factors and Protection for Chronic Diseases 2016. Obesity was considered as a dependent variable and sociodemographic and behavioral factors were considered independent. The prevalence of study variables, total and by sex, with a 95% confidence interval was calculated. Prevalence ratios were calculated as gross, adjusted for age and adjusted for all variables of the model, with a significance level of 5% (p <0.05). Results: We found 18.9% of obesity in the population, 19.6% in women and 18.1% in men. For men, the probability of obesity was higher after the age of 30, when an increase of approximately 63.0% occurred in relation to the younger ones. Black men were less likely to be obese (PR = 0.85) when compared to race / white. The probability of obesity is 32% higher among those with stable marital union and 33% among those classified as poor food standard. Among women, the probability of obesity was higher with increasing age, reaching ≥ 60.0% in the age group between 50 and 59 years of age. Being of race / black skin color was a protective factor (RP = 0.85). The probability of obesity is 32.0% higher among women with stable marital unions and 33.0% higher among women with poor dietary patterns. Conclusion: Obesity is increasing in the population and the use of populationbased surveys are important strategies for designing policies for health promotion and protection.
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