“Daily users of cannabis had rates of psychotic symptoms that were between 1.6 and 1.8 times higher than non-users of cannabis….
The results of the present study add to a growing body of evidence suggesting that regular cannabis use may increase risks of psychosis.
The present study suggests that:
- the association between cannabis use and psychotic symptoms is unlikely to be due to confounding factors; and
- the direction of causality is from cannabis use to psychotic symptoms.”