Key Findings:  This meta-analysis indicates that schizophrenia patients with a concurrent substance use disorder exhibit fewer negative symptoms compared to those who are abstinent.
Type of Study:  Clinical Meta-analysis
Study Sample Size:  1135
Study Result:  Positive
Research Location(s):  Canada
Year of Pub:  2006
Cannabinoids Studied:  Cannabinoid (unspecified)
Phytocannabinoid Source:  Not Applicable
Citation:  Potvin S, et al. A meta-analysis of negative symptoms in dual diagnosis schizophrenia. Psychol Med. 2006; 36:431-40. doi: 10.1017/S003329170500574X
Authors:  Potvin S, Sepehry AA, Stip E