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      Planting the seed for marijuana use: Changes in exposure to medical marijuana advertising and subsequent adolescent marijuana use, cognitions, and consequences over seven years

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          Abstract

          Background:

          Marijuana use during adolescence is associated with neurocognitive deficits and poorer functioning across several domains. It is likely that more states will pass both medical and recreational marijuana legalization laws in the coming elections; therefore, we must begin to look more closely at the longitudinal effects of medical marijuana (MM) advertising on marijuana use among adolescents so that we can better understand effects that this advertising may have on their subsequent marijuana use and related outcomes.

          Methods:

          We followed two cohorts of 7th and 8th graders (mean age 13) recruited from school districts in Southern California from 2010 until 2017 (mean age 19) to examine effects of MM advertising on adolescents’ marijuana use, cognitions, and consequences over seven years. Latent growth models examined trajectories of self-reported exposure to medical marijuana ads in the past three months and trajectories of use, cognitions, and consequences.

          Results:

          Higher average exposure to MM advertising was associated with higher average use, intentions to use, positive expectancies, and negative consequences. Similarly, higher rates of change in MM advertising exposure were associated with higher rates of change in use, intentions, expectancies, and consequences over seven years.

          Conclusions:

          Results suggest that exposure to MM advertising may not only play a significant role in shaping attitudes about marijuana, but may also contribute to increased marijuana use and related negative consequences throughout adolescence. This highlights the importance of considering regulations for marijuana advertising, similar to regulations in place for the promotion of tobacco and alcohol in the U.S.

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          Author and article information

          Journal
          7513587
          3445
          Drug Alcohol Depend
          Drug Alcohol Depend
          Drug and alcohol dependence
          0376-8716
          1879-0046
          10 September 2019
          10 May 2018
          01 July 2018
          14 September 2019
          : 188
          : 385-391
          Affiliations
          [a ]RAND Corporation, 1776 Main St, Santa Monica, CA 90401, USA
          [b ]RAND Corporation, 1200 S Hayes St, Arlington, VA 22202, USA
          Author notes

          Contributors

          EJD conceptualized the idea and wrote the manuscript. AR conducted all analysis for the paper. JT, EP and RS all contributed substantially to the writing of the manuscript, discussing ideas during team meetings and editing drafts during the writing process. All authors have approved the final article.

          [* ]Corresponding author at: RAND Corporation, 1776 Main St Santa Monica, CA 90407-2138, USA. damico@ 123456rand.org (E.J. D’Amico).
          Article
          PMC6744951 PMC6744951 6744951 nihpa1039065
          10.1016/j.drugalcdep.2018.03.031
          6744951
          29779761
          4d705514-b149-420d-8a41-5c2aa5fa7217
          History
          Categories
          Article

          Marijuana legislation,Adolescents,Marijuana use,Longitudinal,Advertising

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