Objective. This study surveyed high school student drug users in urban
areas of Mexico to describe use patterns and drug-related behaviors a
mong adolescents and to develop predictor models of pathways to undera
ge drug use. Subject/design. A National School Survey was conducted am
ong high school students where data are provided by the State. Only ur
ban sites were considered for this study (n = 40 521). Stratified two-
stage cluster sampling was used; schools and groups within the schools
were the sampling units. Conclusions. Male adolescents who have worke
d the previous year, have high exposure within the family and are affi
liated with drug using peers are at increased risk of becoming drug us
ers and subject to depression and suicidal ideation as well as drug-re
lated social problems.