The Impact of State Medical Marijuana Legislation on Adolescent Marijuana Use
The Impact of State Medical Marijuana Legislation on Adolescent Marijuana Use
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DOI：
10.1016/j.jadohealth.2014.02.018
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发表时间：
2014-08-01
影响因子：
7.6
通讯作者：
McConnell, K. John
中科院分区：
文献类型：
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作者：
Choo, Esther K.;Benz, Madeline;McConnell, K. John
目的：州一级的医用大麻合法化引起了人们对这种药物对年轻人的可及性和吸引力增加的担忧。本研究的目的是评估医用大麻合法化的影响，通过比较各州之间的青少年大麻使用的趋势，并没有合法化的医用marijuan.Methods：该研究利用的数据从青少年风险行为监测调查1991年和2011年之间。选择具有医用大麻法律的州进行分析，这些州在法律实施之前和之后至少有两个周期的青年风险行为监测数据。这些州中的每一个都与地理上邻近的一个州配对，而这个州没有实施这项法律。卡方分析用于比较有和没有医用大麻使用政策的州之间的特征。差异中的差异回归进行控制有关的药物使用在每个国家的时间不变的因素，隔离的政策效果，然后计算的边际概率的政策变化的二进制因变量。结果：估计样本为11,703,100名学生。在过去的几年和几个州，过去一个月使用大麻是常见的（20.9%，95%置信区间20.3-21.4）。在任何州配对的政策改变之前和之后，大麻的使用没有统计学上的显著差异。在回归分析中，我们没有发现一个整体增加的概率大麻使用相关的政策变化（边际概率0.007，95%置信区间-0.007，0.02）。结论：这项研究没有发现增加青少年大麻使用相关的医用大麻合法化。(C)2014年青少年健康和医学协会。All rights reserved.
Purpose: The state-level legalization of medical marijuana has raised concerns about increased accessibility and appeal of the drug to youth. The objective of this study was to assess the impact of medical marijuana legalization across the United States by comparing trends in adolescent marijuana use between states with and without legalization of medical marijuana.Methods: The study utilized data from the Youth Risk Behavioral Surveillance Survey between 1991 and 2011. States with a medical marijuana law for which at least two cycles of Youth Risk Behavioral Surveillance data were available before and after the implementation of the law were selected for analysis. Each of these states was paired with a state in geographic proximity that had not implemented the law. Chi-squared analysis was used to compare characteristics between states with and without medical marijuana use policies. A difference-in-difference regression was performed to control for time-invariant factors relating to drug use in each state, isolating the policy effect, and then calculated the marginal probabilities of policy change on the binary dependent variable.Results: The estimation sample was 11,703,100 students. Across years and states, past-month marijuana use was common (20.9%, 95% confidence interval 20.3-21.4). There were no statistically significant differences in marijuana use before and after policy change for any state pairing. In the regression analysis, we did not find an overall increased probability of marijuana use related to the policy change (marginal probability .007, 95% confidence interval -.007, .02).Conclusions: This study did not find increases in adolescent marijuana use related to legalization of medical marijuana. (C) 2014 Society for Adolescent Health and Medicine. All rights reserved.