Cannabis use and misuse prevalence among people with psychosis

Green, Bob, Young, Ross, & Kavanagh, David J. (2005) Cannabis use and misuse prevalence among people with psychosis. British Journal of Psychiatry, 187, pp. 306-313.

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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.

Impact and interest:

126 citations in Scopus
97 citations in Web of Science®
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ID Code: 28679
Item Type: Journal Article
Refereed: Yes
Keywords: Prevalence, Cannabis use, Cannabis misuse, Psychosis
DOI: 10.1192/bjp.187.4.306
ISSN: 0007-1250
Subjects: Australian and New Zealand Standard Research Classification > MEDICAL AND HEALTH SCIENCES (110000) > PUBLIC HEALTH AND HEALTH SERVICES (111700) > Mental Health (111714)
Divisions: Current > QUT Faculties and Divisions > Faculty of Health
Current > Institutes > Institute of Health and Biomedical Innovation
Copyright Owner: Copyright 2005 Royal College of Psychiatrists
Copyright Statement: The definitive publisher-authenticated version is available online at
Deposited On: 18 Nov 2009 00:48
Last Modified: 22 Jun 2017 14:41

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