Cannabis use and nonuse in patients with first-episode psychosis: A systematic review and meta-analysis of studies comparing neurocognitive functioning

Universidad Internacional De La Rioja

However, few have examined the effects of cannabis use on the cognitive symptoms of psychosis (i.e., neurocognitive functioning) in patients with first-episode psychosis (FEP). The lack of significant differences in neurocognitive functioning between CU and NU with FEP in this study could be explained by the fact that vulnerable patients with better cognitive function can develop psychosis owing to cannabis use; this subsample can mask the deleterious effect of cannabis on cognition in other patient groups. [PMC free article] [PubMed] [Google Scholar] [Ref list] Hedges LV. [Google Scholar] [Ref list] Grace AA. [PubMed] [Google Scholar] [Ref list]

https://www.ncbi.nlm.nih.gov/pmc/articles/8057396

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Wechsler Adult Intelligence Scale

Effect size