Changes in cannabis consumption not significantly associated with psychotic-like experiences

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Summary

Age of first use of cannabis may influence future consumption, whether that be higher or lower, but changes in consumption between age 19 and 22 appear not to be associated with a greater frequency of psychotic-like experiences (PLEs). Of the 552 subjects who cited use at age 19, “549 reported having experienced at least one psychotic experience of any form at age 19,” the study notes. Study participants were initially recruited at age 14 in Europe and follow-ups were done at age 16, 19 and 22. Another study published last year showed that study participants who used high-potency cannabis products were twice as likely to report anxiety disorders than those who consumed lower-potency products. So researchers sought to investigate the association of changes in cannabis use over a period of three years with the occurrence of PLEs in a non-clinical sample of young adults.

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Age of first use of cannabis may influence future consumption, whether that be higher or lower, but changes in consumption between age 19 and 22 appear not to be associated with a greater frequency of psychotic-like experiences (PLEs).

That was the finding of a new study, published in Schizophrenia Research, by a team of researchers from around the world.

Although no causal relationship has been proved, the association between changes in cannabis use and changes in the frequency of PLEs “strongly suggests a bidirectional association and a reduction of...

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