Kavanagh, D. J., Waghorn, G., Jenner, L., Chant, D. C., Carr, V., Evans, M., Herrman, H., Jablensky, A., & McGrath, J. J. (2004). Demographic and clinical correlates of comorbid substance use disorders in psychosis: multivariate analyses from an epidemiological sample. Schizophrenia Research, 66(2), 115–124. https://doi.org/10.1016/S0920-9964(03)00130-0

Arizona State University

This study aimed to find the prevalence of substance abuse in individuals with psychotic disorders. Results of this study found that the lifetime prevalence of one or more categories of substance abuse and dependence was 39.8% for all psychoses and 42.1% for schizophrenia. The study also found that males were more likely to have a comorbid substance use disorder than females, and younger age groups reported higher use of illegal drugs. 

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