Cannabis use and first-episode psychosis: relationship with manic and psychotic symptoms, and with age at presentation
Psychological Medicine May 24, 2013 James Stone, Helen L. Fisher, Barnaby Major et al. 69 citations
BACKGROUND: Cannabis use has been reported to be associated with an earlier onset of symptoms in patients with first-episode psychosis, and a worse outcome in those who continue to take cannabis. In general, studies have concentrated on symptoms of psychosis rather than mania. In this study, using a longitudinal design in a large naturalistic cohort of patients with first-episode psychosis, we...