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Rates and Predictors of Conversion to Schizophrenia or Bipolar Disorder Following Substance-Induced Psychosis.

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Authors: Marie Stefanie Kejser Starzer, Merete Nordentoft, Carsten Hjorthøj
American Journal of Psychiatry, April 2018
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OBJECTIVE: The authors investigated the rates of conversion to schizophrenia and bipolar disorder after a substance-induced psychosis, as well as risk factors for conversion. METHOD: All patient information was extracted from the Danish Civil Registration System and the Psychi…

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Potential protective effects of cannabidiol on neuroanatomical alterations in cannabis users and psychosis: a critical review.

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Authors: Derik Hermann , Miriam Schneider
Current Pharmaceutical Design, 2012
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Cannabis use and the development of schizophrenic psychoses share a variety of similarities. Both start during late adolescence; go along with neuropsychological deficits, reduced activity, motivation deficits, and hallucinations suggesting impairment of similar brain structur…

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If cannabis caused schizophrenia–how many cannabis users may need to be prevented in order to prevent one case of schizophrenia? England and Wales calculations.

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Authors: Matt Hickman, Peter Vickerman, John Macleod, Glyn Lewis, Stan Zammit, et al
Addiction, November 2009
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BACKGROUND: We consider how many cannabis users may need to be prevented in order to prevent one case of schizophrenia or psychosis [defined as number needed to prevent (NNP)]. METHOD: Calculation for England and Wales using best available estimates of: incidence of schizophre…

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