[Tobacco use in Brazilian school adolescents: association with mental health and family context].

Objective: To study the association between aspects of mental health and the family context with tobacco experimentation and consumption among Brazilian schoolchildren.

Method: A cross-sectional study using data from the National Survey of Schoolchildren's Health in Brazil conducted on 109,104 schoolchildren from the ninth year of elementary school, day scholars in public and private schools in all Brazilian state capitals and the Federal District. Descriptive analysis of variables, bivariate and multivariate analyses were performed with logistic regression estimates, adjusted for socioeconomic variables, obtaining the odds ratio (OR) and 95% confidence interval (95%CI).

Results: Among the participants, 52.2% were female. Twenty point nine percent of the students reported having experimented with cigarettes at least once. Adolescents who experienced more often feelings of loneliness (OR: 2.07; 95%CI: 1.98-2.16), difficulty sleeping (OR: 2.37; 95%CI: 2.52-2.48) and lower social interaction (OR: 1.27; 95%CI: 1.26-1.32), were more likely to smoke, regardless of socioeconomic status. The schoolchildren of parents or caregivers (OR: 2.39; 95%CI: 2.29-2.49) who did not know what their children did in their free time (OR: 1.52; 95%CI: 1.46-1.59) were associated with more frequent cigarette smoking.

Conclusion: An association was seen between aspects of mental health and the family context with the experimentation and consumption of tobacco in adolescents enrolled in the study in Brazil. These associations are independent of school type, sex and skin colour. It is important that programmes for the prevention of tobacco use in adolescence emphasise these findings.