PRIMARY STUDY

Adolescent cannabis use and adult psychoticism: A longitudinal co-twin control analysis using data from two cohorts

Key Findings:  After analyzing data from two samples i.e. cannabis use (N = 1544) and cannabis use disorder symptoms (N = 1458) in adolescence the authors concluded that while cannabis use and cannabis use disorder are consistently associated in the literature with an increased risk of developing psychosis, these recent results suggest this association is likely attributable to familial confounds rather than a causal effect of cannabis exposure. As such, the authors posit that adolescent cannabis use is not an independent cause of psychosis in adulthood.