Causal association between cannabis and psychosis: examination of the evidence.

  title={Causal association between cannabis and psychosis: examination of the evidence.},
  author={Louise Arseneault and Mary Cannon and John Witton and Robin MacGregor Murray},
  journal={The British journal of psychiatry : the journal of mental science},
BACKGROUND Controversy remains as to whether cannabis acts as a causal risk factor for schizophrenia or other functional psychotic illnesses. AIMS To examine critically the evidence that cannabis causes psychosis using established criteria of causality. METHOD We identified five studies that included a well-defined sample drawn from population-based registers or cohorts and used prospective measures of cannabis use and adult psychosis. RESULTS On an individual level, cannabis use confers… CONTINUE READING
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