Study: No Increase in Prevalence of Cannabis Use Disorders

A report published last fall claiming that an estimated three in ten consumers of cannabis suffer from a ‘use disorder’ has been dismissed in a new study published in JAMA Psychiatry.

Investigators at the Washington School of Medicine in St. Louis assessed trends in marijuana use and the prevalence of marijuana use disorders during the years 2002 to 2013. Researchers determined that the self-reported use of cannabis by adults increased an estimated 19 percent, but that reports of cannabis-related problems actually declined during this…