A new study from Denmark has found that heavy use of cannabis is linked to as much as a fifth of schizophrenia cases among young men.
The massive Danish study was published by the Cambridge Journal of Psychological Medicine, and examined 6.9 million people aged 16-49, and more than 45,000 schizophrenia cases dating from 1972 to 2021.
The study, published on 4 May, found that young males may be “particularly susceptible” to the effects of cannabis on schizophrenia. The new research has been described by Scientific American as “likely the largest epidemiological investigation conducted to date that directly focused on the cannabis-psychosis question.”
Researchers found that the adjusted incidence risk ratio for males aged 16 to 20 was more than twice that for females of the same age group, concluding that up to 30 percent of psychosis diagnosis in young men – about 3,000 in total – could have been prevented if those individuals had not used marijuana heavily.
The comparable prevention percentages for the broader age range of 16 to 49 were 15 percent for men – and 4 percent for women.
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Strong link between heavy marijuana use and mental illness, Danish study finds – Gript
STRONG LINK BETWEEN HEAVY MARIJUANA USE AND MENTAL ILLNESS, DANISH STUDY FINDS
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