Study: Marijuana Legalization Associated With Decrease in Binge Drinking by College Students

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Study: Marijuana Legalization Associated With Decrease in Binge Drinking by College Students

According to a new study, the legalization of recreational marijuana is associated with decreasing rates of binge drinking by college students ages 21 or older.

The study, titled, Trends in college students’ alcohol, nicotine, prescription opioid and other drug use after recreational marijuana legalization: 2008-2018, was published in the journal Addictive Behaviors.

“Young adult college students may be particularly sensitive to recreational marijuana legalization (RML)”, states the study’s abstract. “Although evidence indicates the prevalence of marijuana use among college students increased after states instituted RML, there have been few national studies investigating changes in college students’ other substance use post-RML.”


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According to researchers “The cross-sectional National College Health Assessment-II survey was administered twice yearly from 2008 to 2018 at four-year colleges and universities. Participants were 18–26 year old undergraduates attending college in states that did (n = 243,160) or did not (n = 624,342) implement RML by 2018.”

Outcome variables were self-reported nicotine use, binge drinking, illicit drug use, and misuse of prescription stimulants, sedatives, and opioids. Other variables included individual and contextual covariates, and institution-reported institutional and community covariates. Publicly available information was used to code state RML status at each survey administration.

“Accounting for state differences and time trends, RML was associated with decreased binge drinking prevalence among college students age 21 and older [OR (95% CI) = 0.91 (0.87 − 0.95), p < .0001] and increased sedative misuse among minors [OR (95% CI) = 1.20 (1.09 − 1.32), p = .0003]”, states researchers. “RML did not disrupt secular trends in other substance use.”\

The study concludes by stating: “In the context of related research showing national increases in college students’ marijuana use prevalence and relative increases following state RML, we observed decreases in binge drinking and increases in sedative use that both depended on age. Findings support some specificity in RML-related changes in substance use trends and the importance of individual factors.”

The full abstract can be found below:

Background

Young adult college students may be particularly sensitive to recreational marijuana legalization (RML). Although evidence indicates the prevalence of marijuana use among college students increased after states instituted RML, there have been few national studies investigating changes in college students’ other substance use post-RML.

Method

The cross-sectional National College Health Assessment-II survey was administered twice yearly from 2008 to 2018 at four-year colleges and universities. Participants were 18–26 year old undergraduates attending college in states that did (n = 243,160) or did not (n = 624,342) implement RML by 2018. Outcome variables were self-reported nicotine use, binge drinking, illicit drug use, and misuse of prescription stimulants, sedatives, and opioids. Other variables included individual and contextual covariates, and institution-reported institutional and community covariates. Publicly available information was used to code state RML status at each survey administration.

Results

Accounting for state differences and time trends, RML was associated with decreased binge drinking prevalence among college students age 21 and older [OR (95% CI) = 0.91 (0.87 − 0.95), p < .0001] and increased sedative misuse among minors [OR (95% CI) = 1.20 (1.09 − 1.32), p = .0003]. RML did not disrupt secular trends in other substance use.

Conclusions

In the context of related research showing national increases in college students’ marijuana use prevalence and relative increases following state RML, we observed decreases in binge drinking and increases in sedative use that both depended on age. Findings support some specificity in RML-related changes in substance use trends and the importance of individual factors.

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