Journal article

No additive effect of cannabis on cognition in schizophrenia

Brian D Power, Milan Dragovic, Johanna C Badcock, Vera A Morgan, David Castle, Assen Jablensky, Nikos C Stefanis

SCHIZOPHRENIA RESEARCH | ELSEVIER | Published : 2015

Abstract

BACKGROUND: We aimed to examine the association between lifetime cannabis use and estimates of both premorbid and current cognitive function in psychotic disorders in an Australian cohort. METHODS: In an Australian multicenter cohort, 1237 participants with an established ICD-10 diagnosis of psychotic disorder were categorised according to history of lifetime cannabis use (non-users, n=354; cannabis users, n=221; cannabis dependency, n=662). Groups were analyzed according to available indices of cognitive ability: the National Adult Reading Test - Revised (NART-R) for ability prior to illness onset; and the Digit Symbol Coding Test (DSCT) for current ability. Two-way analysis of variance was..

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University of Melbourne Researchers