Individual and Contextual Characteristics Associated With Alcohol Use Among Brazilian Adolescents.

To analyze the association between individual and contextual characteristics with alcohol indicators of experimentation, use in the last 30 days and drunkenness in Brazilian adolescents. Cross-sectional study based on data from 100,914 student attending 9 grade from the 2015 National School Health Survey. Multilevel logistic regression models were performed for the outcomes: alcohol experimentation; use in the last 30 days and drunkenness; and exposures, adjusted for adolescents' sociodemographic characteristics. Girls were more likely to experiment alcohol (OR = 1.09; 95% CI = 1.05-1.12), use it in the last 30 days (OR = 1.09; 95% CI = 1.00-1.13) and less prone to drunkenness (OR = 0.90; 95% CI = 0.87-0.93). A higher proportion of public-school students reported drinking. There was a positive association of substance use by parents, peers and the adolescents themselves with the outcomes. Having a policy of banning alcohol consumption at school was associated with a greater chance of alcohol experimentation in public schools. Exposure to legal and illegal substances by friends, family members and a prohibitive school environment favored the outcomes.