A study shows teenagers using cannabis may be 11 times more likely to develop a psychotic disorder than non-users. This relationship seems particularly strong during adolescence, highlighting the increased potency of cannabis as a significant factor. Credit: SciTechDaily.com
This finding suggests that the association between cannabis and psychotic disorders may be stronger than indicated by previous research, which has relied largely on older data when cannabis was less potent than today. For context, the average THC potency of cannabis in Canada has increased from roughly 1% in 1980 to 20% in 2018.
The study is the first to show an age-dependent association between self-reported cannabis use and subsequent psychotic disorder diagnosis, which adds to a growing body of research on the mental health risks associated with cannabis. Of the teens who were hospitalized or visited an ED for a psychotic disorder, roughly 5 in 6 had previously reported cannabis use. McDonald points out that, “the vast majority of teens who use cannabis will not develop a psychotic disorder, but according to these data, most teens who are diagnosed with a psychotic disorder likely have a history of cannabis use.
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