Structure does not influence family function during adolescence. However, the adolescent perception of the family structure influences social support, the consumption of drugs and alcohol and the presence of depressive symptoms.

In the last 8 years the consumption of toxic substances among adolescents has dropped, mainly because of less alcohol consumption. However, new forms of consumption of alcohol and other illegal drugs, especially at weekends, emerged and daily consumption of tobacco increased.

The intervention on alcohol consumption of adolescents should incorporate their motivation to achieve greater efficiency.

The perception of family function in adolescents has changed and now does not depend on sex, age and structure. Family care during adolescence should focus on promoting positive family dynamics, regardless of family structure.