Recreational Marijuana Availability in Oregon and Use Among Adolescents


      This study investigated whether legalization of recreational marijuana sales and retail availability of marijuana in Oregon counties were associated with higher levels of marijuana use and related beliefs among adolescents.


      Biennial data for 6th, 8th, and 11th graders from the 2010–2018 Student Wellness Survey in 35 Oregon counties (n=247,403) were analyzed in 2019 to assess changes in past 30–day marijuana use and beliefs (e.g., perceived availability of marijuana) in counties that allowed recreational marijuana sales in unincorporated areas beginning in October 2015 versus counties that did not. Analyses were also conducted with 2016 and 2018 Student Wellness Survey data (n=101,419) to determine whether the association between allowing recreational marijuana sales and marijuana use could be accounted for by retail marijuana outlet density and beliefs.


      Higher rates of past 30–day marijuana use and more favorable beliefs were observed in counties that allow recreational marijuana sales in unincorporated areas, both before and after legalization of recreational sales in 2015. The prevalence of past 30–day marijuana use increased, relative to the downward secular trend, after legalization both in counties that did and did not allow recreational marijuana sales. There were parallel changes in beliefs favorable to marijuana use. Analyses with 2016 and 2018 Student Wellness Survey data suggested that the association between allowing recreational marijuana sales and past 30–day marijuana use could be accounted for by retail marijuana outlet density and beliefs.


      Legalization and greater retail availability of recreational marijuana are positively associated with marijuana use among adolescents.
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      1. National Conference of State Legislatures. State medical marijuana Updated September 27, 2019. Accessed August 19, 2019.

        • National Academies of Sciences, Engineering, and Medicine
        The Health Effects of Cannabis and Cannabinoids: the Current State of Evidence and Recommendations for Research.
        National Academies Press, Washington, DC2017
        • Flay BR
        • Schure MB
        The theory of triadic influence.
        in: Wagenaar AC Burris S Public Health Law Research, Theory and Methods. Jossey-Bass, San Francisco, CA2013: 169-191
        • Bandura A
        Social Foundations of Thought and Action: A Social Cognitive Theory.
        Prentice Hall, Englewood Cliffs, NJ1986
        • Brooks-Russell A
        • Ma M
        • Levinson AH
        • et al.
        Adolescent marijuana use, marijuana-related perceptions, and use of other substances before and after initiation of retail marijuana sales in Colorado (2013–2015).
        Prev Sci. 2019; 20: 185-193
        • Dilley JA
        • Richardson SM
        • Kilmer B
        • Pacula RL
        • Segawa MB
        • Cerdá M
        Prevalence of cannabis use in youths after legalization in Washington State.
        JAMA Pediatr. 2019; 173: 192-193
      2. Oregon Health Authority. Youth marijuana use, attitudes and related behaviors in Oregon. Published February 2019. Accessed June 14, 2019.

      3. Oregon Health Authority. Cannabis Laws in Oregon. Accessed November 13, 2019.

        • Rusby JC
        • Westling E
        • Crowley R
        • Light JM
        Legalization of recreational marijuana and community sales policy in Oregon: impact on adolescent willingness and intent to use, parent use, and adolescent use.
        Psychol Addict Behav. 2018; 32: 84-92
      4. Oregon Health Authority. Oregon student wellness survey. Accessed February 19, 2019.

      5. Oregon Liquor Control Commission. Record of cities/counties prohibiting licensed recreational marijuana facilities. Updated January 11, 2019. Accessed November 10, 2018.

      6. Oregon Liquor Control Commission. Active marijuana retail licensesapproved as of 11/8/2019. Accessed on November 13, 2019.

      7. Oregon Department of Transportation. 2016 Oregon mileage report. Published July 2017. Accessed June 30, 2019.

      8. U.S. Department of Agriculture, Economic Research Service. Rural–urban continuum codes. Updated August 20, 2019. Accessed June 30, 2019.

        • Raudenbush S
        • Bryk A
        • Cheong YF
        • Congdon R
        • du Toit M
        HLM 7: Hierarchical linear and nonlinear modeling.
        Scientific Software International, Lincolnwood, IL2011
        • Miech RA
        • Johnston L
        • O'Malley PM
        • Bachman JG
        • Schulenberg J
        • Patrick ME
        Trends in use of marijuana and attitudes toward marijuana among youth before and after decriminalization: the case of California 2007–2013.
        Int J Drug Policy. 2015; 26: 336-344
        • Wen H
        • Hockenberry JM
        • Druss BG
        The effect of medical marijuana laws on marijuana-related attitude and perception among US adolescents and young adults.
        Prev Sci. 2019; 20: 215-223
        • Paschall MJ
        • Grube JW
        • Black CA
        • Ringwalt CL
        Is commercial alcohol availability related to adolescent alcohol sources and alcohol use? Findings from a multi-level study.
        J Adolesc Health. 2007; 41: 168-174