Science Plus Story
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Science Plus Story

Photo by Itay Kabalo on Unsplash

Skunked by Causation vs. Correlation

  • People who use cannabis daily are three times more likely to have a psychotic disorder than those who have never used the drug;
  • Daily users of high-potency cannabis (cannabis with THC levels above 10 percent) are four times more likely to report psychotic disorders than never-users; and
  • Rates of new diagnoses of psychosis were highest in three European cities in the study — London, Paris and Amsterdam — where high THC cannabis is readily available.



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Bob Lalasz

Founder & principal, Science+Story. Guiding researchers to become public experts & research organizations to share their expertise publicly.