uToronto study reveals insights into teen substance use

March 28, 2014

A new study on substance co-use among teens by researchers at the University of Toronto suggests that students who smoke only marijuana outperform students who smoke both marijuana and tobacco. The uToronto Dalla Lana School of Public Health researchers surveyed 38,331 students in grades 7, 9 and 11; they measured poor academic performance as an indicator of problem behaviour to see if it was related to substance use or co-use. “Drug prevention programs should be aligned with student realities, which means acknowledging and addressing patterns of co-use,” says study co-author Maritt Kirst. “This study identifies which youth are most at risk and can help public health professionals tailor prevention programs accordingly.” The study also reveals that 92% of teen cigarette smokers also use marijuana, that 25% of teen marijuana users also smoke cigarettes, and that 90% of students do not use either substance. uToronto News Release | Study Page