Objective:

to analyze the association among socio-demographic profile, family system variables, and consumption of alcohol, tobacco, and other drugs in life among school adolescents.

Methods:

Cross-sectional study performed with 364 students of aged 14 to 19 years. Three instruments were used: ASSIST, a short version of DUSI, and the participants´ socio-demographic profile.

Results:

An association of school retainment, place of residence, and religion with alcoholic beverage consumption was evidenced. For each point in the DUSI score, the chances of alcoholic beverage consumption increased by 3%, residing in the urban area increased 3 times the chance for consuming those substances, and being a member of evangelical religion appeared as a protection factor.

Conclusions:

this study confirmed high rates of drug use by adolescents and that the quality of family relations influence the consumption pattern.