Tobacco and alcohol consumption among adolescents.

This study analyzes the consumption of alcohol and tobacco among high-school adolescents in the district of Porto, Portugal. The results reveal the following: the majority of respondents do not smoke; smoking starts earlier in the case of girls; smoking increases with age; peer pressure is an important factor influencing smoking; about half of adolescents consume alcohol; boys drink more than girls; the number of those who consume alcohol increases with age; distilled drinks are the choice for both genders; 44.1% of the respondents became intoxicated at least once and the majority has no intention to quit drinking.