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Research

Proportion of patients in south London with first-episode psychosis attributable to use of high potency cannabis: a case–control study.

The authors obtained data from 410 patients with first-episode psychosis and 370 population controls in south London between May 1,2005 and May 31, 2011. The risk of individuals having a psychotic disorder showed a roughly three-times increase in users of “skunk-like” cannabis (high potency THC with minimal or no CBD) compared with those who never used cannabis. The risk of developing a psychotic disorder increased with increased frequency of use.

By Forti M., Marconi A., Carra E., Fraietta S., Trotta A., Bonomo M. et al

Read the full study at APA PsychNet.

Research