Researchers at Harvard, NYU, and the VA say in a study published online today by Schizophrenia Research that the age at which 57 subjects with non-affective psychoses began to use marijuana was directly associated with the age of onset of psychosis and age of first hospitalization. “These associations remain significant after adjusting for potential confounding factors and are consistent with the hypothesis that cannabis could cause or precipitate the onset of psychosis after a prolonged period of time.”
Buccollini, J., Proal, A., et al; “Association between age at onset of psychosis and age at onset of cannabis use in non-affective psychosis.” Schizophrenia Research. online June 21, 2012
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