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Br J Psychiatry. 2005 Oct;187:306-13.

Cannabis use and misuse prevalence among people with psychosis.

Author information

  • 1Community Forensic Mental Health Service, 42 Albert Street, Brisbane 4001, Australia. bob_green@health.qld.gov.au

Abstract

BACKGROUND:

Increasing attention has been given by researchers to cannabis use in individuals with psychosis. As psychoses are relatively low-prevalence disorders, research has been mostly been restricted to small-scale studies of treatment samples. The reported prevalence estimates obtained from these studies vary widely.

AIMS:

To provide prevalence estimates based on larger samples and to examine sources of variability in prevalence estimates across studies.

METHOD:

Data from 53 studies of treatment samples and 5 epidemiological studies were analysed.

RESULTS:

Based on treatment sample data, prevalence estimates were calculated for current use (23.0%), current misuse (11.3%), 12-month use (29.2%), 12-month misuse (18.8%), lifetime use (42.1%) and lifetime misuse (22.5%). Epidemiological studies consistently reported higher cannabis use and misuse prevalence in people with psychosis.

CONCLUSIONS:

The factor most consistently associated with increased odds of cannabis prevalence was specificity of diagnosis. Factors such as consumption patterns and study design merit further consideration.

PMID:
16199787
[PubMed - indexed for MEDLINE]
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