Oregon recreational marijuana legalization: Changes in undergraduates' marijuana use rates from 2008 to 2016

Psychology of Addictive Behaviors : Journal of the Society of Psychologists in Addictive Behaviors
David C R KerrAndrew L Koval

Abstract

There have been few studies of marijuana use before and after recreational marijuana legalization (RML) in affected states. We tested whether marijuana use rates increased more among college students in Oregon than in non-RML states following Oregon RML in July 2015. Repeated cross-sectional National College Health Assessment-II surveys were completed by random samples of students within participating colleges from 2008 to 2016. Data were from 4-year institutions that participated both before and after Oregon RML. Undergraduates (ages 18-26 years) from 2 institutions in Oregon (n = 7,412) and 123 institutions (n = 274,340) in non-RML U.S. states self-reported use of marijuana, tobacco, alcohol, and other drugs in the past 30 days. Mixed-effects regressions accounted for clustering of participants within institutions and controlled for individual-, context-, and institution-level factors as well as secular changes in substance use rates from 2008 to 2016. Following RML, Oregon students (compared to non-RML-state students) showed relative increases in rates of marijuana use (odds ratio [OR] = 1.29, 95% confidence interval [CI: 1.13, 1.48], p = .0002, and decreases in tobacco use rates (OR = .71, 95% CI [.60, .85], p < .0001). Cha...Continue Reading

Citations

Aug 29, 2019·International Journal of Environmental Research and Public Health·Anees Bahji, Callum Stephenson
Jul 23, 2020·Substance Abuse : Official Publication of the Association for Medical Education and Research in Substance Abuse·Michael LevineFrank LoVecchio
Jul 19, 2020·International Journal of Environmental Research and Public Health·Walid El AnsariSakari Suominen
Jan 4, 2021·Addictive Behaviors·Neal DoranLyric Tully
Jan 14, 2020·The International Journal on Drug Policy·Samantha GoodmanUNKNOWN International Cannabis Policy Study team
Jun 3, 2021·International Journal of Environmental Research and Public Health·Elisa BenedettiSabrina Molinaro
Mar 1, 2020·The International Journal on Drug Policy·David HammondWayne Hall
Jul 24, 2021·Substance Use & Misuse·Katelyn F RommCarla J Berg
Jan 14, 2022·Surgical Endoscopy·Tarin WorrestFarah Husain

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