Writing in the Journal of Clinical Psychiatry, federal investigators from the US National Institute on Drug Abuse and the Substance Abuse Mental Health Services Administration evaluated marijuana use rates among young people (ages 12 to 17) between the years 2002 and 2014.
Researchers reported that the prevalence of past-year cannabis use by youth fell 17 percent during this time period. The prevalence of problematic use by young people fell by 25 percent – with a downward trend starting in 2011.
“In the United States, compared to 2002, even after adjusting for covariates, cannabis use decreased among youth during 2005-2014, and cannabis use disorder declined among youth cannabis users during 2013-2014,” authors concluded.
The study’s findings are consistent with those of numerous other papers reporting no uptick in youth marijuana use or abuse following the enactment of marijuana regulation, including those here, here, here, here, here, here, and here.
An abstract of the study, “Cannabis use and cannabis use disorders in the United States, 2002-2014,” appears online here.