Association Between Age of Psychosis Onset and Cannabis Use


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.”

Abstract → 

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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Kermit Cole
Kermit Cole, MFT, founding editor of Mad in America, works in Santa Fe, New Mexico as a couples and family therapist. Inspired by Open Dialogue, he works as part of a team and consults with couples and families that have members identified as patients. His work in residential treatment — largely with severely traumatized and/or "psychotic" clients — led to an appreciation of the power and beauty of systemic philosophy and practice, as the alternative to the prevailing focus on individual pathology. A former film-maker, he has undergraduate and master's degrees in psychology from Harvard University, as well as an MFT degree from the Council for Relationships in Philadelphia. He is a doctoral candidate with the Taos Institute and the Free University of Brussels. You can reach him at [email protected].