Adolescent substance use and educational attainment: An integrative data analysis comparing cannabis and alcohol from three Australasian cohorts

Adolescent cannabis use increased the odds of non-progression with formal education.

• •Associations for adolescent alcohol use were inconsistent and weaker.
• •Cannabis use accounted for a greater proportion of the overall rate of educational underachievement than alcohol use.
• •Findings inform the debate about the relative harms of cannabis and alcohol use.