Effects of continuation, frequency, and type of cannabis use on relapse in the first 2 years after onset of psychosis: an observational study.
The Lancet Psychiatry October 1, 2016 Tabea Schoeler, Natalia Petros, Marta Di Forti et al.
BACKGROUND Although cannabis use after a first episode of psychosis has been associated with relapse, little is known about the determinants of this most preventable risk factor for relapse of psychosis. Here we aimed to study whether the effects on outcome vary depending on the type of cannabis consumed and usage pattern. METHODS In this observational study, we prospectively recruited and...