Journal
ACTA PSYCHIATRICA SCANDINAVICA
Volume 115, Issue 4, Pages 304-309Publisher
WILEY
DOI: 10.1111/j.1600-0447.2006.00900.x
Keywords
substances; cannabis; alcohol; schizophrenia; psychosis
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Objective: The purpose was to determine the prevalence of substance use and its impact on outcome 3 years after presentation for a first-episode of psychosis. Method: Objects were 203 consecutive admissions to an early psychosis program. Assessments included substance use, positive, negative and depressive symptoms and social functioning. Assessments occurred at baseline, and 1-, 2- and 3-year follow-ups. Results: The prevalence of substance misuse was high with 51% having a substance use disorder (SUD), 33% with cannabis SUD and 35% with an alcohol SUD. Numbers with an alcohol SUD declined considerably by 1 year and for cannabis SUD by 2 years. Substance misuse was significantly associated with male gender, young age and age of onset and cannabis misuse with increased positive symptoms. Conclusion: This study confirms the high rates of substance misuse, in particular cannabis, in first-episode psychosis. It further demonstrates that these rates can be reduced.
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