Daily marijuana use and problem behaviors among adolescents

Previous research by Johnston has shown that high school seniors who are daily marijuana users are distinct from the larger population of seniors in a variety of ways. This paper focuses on adolescent daily marijuana users. It replicates Johnston's work and also qualifies it in an important way. We find that level of marijuana use does not make a significant independent contribution to school problems when such critical factors as lifetime cigarette smoking, lifetime multiple drug use, whether respondent has ever used an illicit drug, rebelliousness, and gender, are taken into account. It is concluded that use of marijuana is only one element in a large and complex picture of interrelated problems and behaviors.