Trends in youth cannabis use across cannabis legalization: Data from the COMPASS prospective cohort study.

ABSTRACT: Canada legalized recreational cannabis use for adults on October 17, 2018 with decision-makers emphasising the need to reduce cannabis use among youth. We sought to characterise trends of youth cannabis use before and after cannabis legalization by relying on a quasi-experimental design evaluating cannabis use among high school students in Alberta, British Columbia, Ontario, and Québec who participated in the COMPASS prospective cohort study. Overall trends in use were examined using a large repeat cross-sectional sample (n = 102,685) at two time points before legalization (16/17 and 17/18 school years) and one after (18/19 school year). Further differential changes in use among students affected by legalization were examined using three sequential four-year longitudinal cohorts (n = 5,400

SUBMITTER: Zuckermann AME 

PROVIDER: S-EPMC8010707 | biostudies-literature | 2021 Jun

REPOSITORIES: biostudies-literature