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Recent interest has focused on the association between cannabis use and risk of psychosis. In the largest unselected population-based study on this topic to date, we examined cannabis use and prodromal symptoms of psychosis at age 15-16 years among 6330 adolescents. Those who had tried cannabis (n=352; 5.6% of the total sample) were more likely to present three or more prodromal symptoms even after controlling for confounders including previous behavioural symptoms (OR=2.23; 95% CI 1.70-2.94).doi:10.1192/bjp.bp.107.045740 pmid:18515902 fatcat:fwov3on66zai7n2vsr3slsnzsy