Knowledge and Resource Hub
19 December 2019

Association between recreational marijuana legalization in the United States and changes in marijuana use and cannabis use disorder from 2008 to 2016

This research examined if the incidence of marijuana use and cannabis use disorder changed during 2008 to 2016 after the legalisation of recreational marijuana in the United States. During this period, the proportion of respondents aged 12 to 17 years reporting cannabis use disorder increased from 2.18% to 2.72%, while the proportion of respondents 26 years or older reporting frequent marijuana use increased from 2.13% to 2.62% and those with cannabis use disorder, from 0.90% to 1.23%. The authors concluded that the findings suggest that possible increases in the risk for cannabis use disorder among adolescent users and increases in frequent use and cannabis use disorder among adults after legalisation of recreational marijuana use may raise public health concerns and warrant ongoing study.