Citation

Freeman TP. Lancet Psychiatry 2015; 2(3): 195-196.

Copyright

(Copyright © 2015, Elsevier Publishing)

DOI

10.1016/S2215-0366(14)00130-8

PMID

unavailable

Abstract

The association between cannabis use and psychosis is well established, with estimated odds ratios (ORs) of 1·4 for lifetime exposure and 2·1 for frequent use according to longitudinal population-based cohorts. These results seem to show a dose-response effect, but have not taken account of a key component of cannabis--its potency. In The Lancet Psychiatry, Marta Di Forti and colleagues address this gap with a case-control analysis of first-episode psychosis. Strengths of the study include the large sample of patients (n=410), an impressive response rate for participation (461 [76%] of 606 individuals) and appropriate control for confounding by gender, ethnicity, education, employment status, and other drug use.

Language: en