According to a new study published in the Journal of Psychopathology and Clinical Science, the use of marijuana over several decades is not associated with a significantly elevated risk of either psychiatric disorders, cognitive decline, or other adverse psychosocial outcomes.
For the study researchers at the University of Minnesota and the University of Colorado examined the long-term impact of marijuana use on psychiatric and psychosocial outcomes in a sample of more than 4,000 adult twins assessed between 1994 to 2021.
“In a sample of 4,078 American adult twins first assessed decades ago, we used cotwin control mixed effects models to evaluate the effect of lifetime average frequency of cannabis consumption measured on substance use, psychiatric, and psychosocial outcomes”, states the study.
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