期刊
AMERICAN JOURNAL OF DRUG AND ALCOHOL ABUSE
卷 45, 期 4, 页码 392-399出版社
TAYLOR & FRANCIS INC
DOI: 10.1080/00952990.2019.1599381
关键词
Cannabis; recreational marijuana legalization; young adulthood; descriptive norms; Oregon; college students
资金
- John C. Erkkila, M.D. Endowment for Health and Human Performance
- Medical Research Foundation of Oregon
Background: Oregon students' rates of marijuana use have increased following recreational marijuana legalization (RML), but the relation between RML and students' perceived peer use of marijuana - or descriptive norms - is unknown. Objectives: This study examined whether perceived peer use of marijuana changed more following RML for college students in Oregon than in states without RML. Methods: Repeated cross-sectional data were collected from the National College Health Assessment-II surveys from 2008 to 2016 to assess changes in descriptive norms (Within the last 30 days, what percent of students at your school used marijuana?) among 18-26 year-old undergraduates from two Oregon institutions and 123 institutions in non-RML states (N = 280,006; 66.23% female; 33.19% male) following Oregon RML (7/1/2015). Mixed-effects regressions were used to account for clustering at the institutional level; models controlled for covariates and secular changes in descriptive norms. Results: RML was associated with higher perceived rates of marijuana use by peers [Percent Increase = 3.09, p < .001]. The effect was significant for respondents who had never used marijuana [Percent Increase = 3.72, p < .001], but not for respondents who recently or ever previously used marijuana. Respondents who had recently used marijuana had higher descriptive norms than those who had never used [Percent Increase = 12.83, p < .001]. Conclusions: Given the association between descriptive norms and personal use, RML-related increases in descriptive norms among non-using students could contribute to future marijuana use initiation and may be one mechanism linking RML with higher rates of marijuana use among college students.
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