Cannabis use and symptom severity in individuals at ultra high risk for psychosis: a meta-analysis.
Rebekah CarneyJack CotterJ FirthT BradshawA R YungPublished in: Acta psychiatrica Scandinavica (2017)
Ultra high risk individuals have high rates of cannabis use and CUDs, and cannabis users had more severe positive symptoms. Targeting substance use during the UHR phase may have significant benefits to an individual's long-term outcome.