Age Differences in Daily and Nondaily Cannabis Use in the United States, 2002-2014

Age Differences in Daily and Nondaily Cannabis Use in the United States, 2002-2014
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DOI:
10.15288/jsad.2018.79.423
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发表时间:
2018-05-01
影响因子:
3.4
通讯作者:
Martins, Silvia S.
Martins, Silvia S.
中科院分区:
医学3区
文献类型:
--
作者:
Mauro, Pia M.;Carliner, Hannah;Martins, Silvia S.

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目的:自2002年以来,特别是在2007年之后,美国的成人大麻使用有所增加,与此形成对比的是青年人的稳定/下降趋势。我们调查了特定年龄组是否对每日和非每日大麻使用趋势的变化做出了不成比例的贡献。方法:来自2002-2014年全国药物使用和健康调查的12岁及以上的参与者(N = 722,653)报告了去年的大麻使用频率(即,每日= >= 300天/年;非每日= 1-299天/年;无)。使用多项逻辑回归对按年龄组划分的过去一年每日和非每日大麻使用率的变化进行建模(即,12-17,18-25,26-34,35-49,50-64,>= 65),2007年之前和之后。多项logistic回归估计了大麻使用频率随时间推移按年龄的相对几率的变化,并对其他社会人口统计学进行了调整。结果:每日大麻使用流行率在2007年之前在12-17岁之间下降,仅在2007年之后在成人年龄组中显着增加。在18-64岁的成年人中,增幅没有显著差异,在1至2个百分点之间。2007年之前,12-25岁和35-49岁的受访者的非日常大麻使用量有所下降,2007年之后,各年龄段的成年人使用量有所增加,特别是26-34岁的成年人(即,4.5百分点)。2007年后,12-64岁人群每日与非每日使用大麻的调整后几率增加。结论:2007年以后,每日和非每日大麻使用流行率的增加是在大麻立法、态度和风险认知越来越宽松的背景下,成年年龄组特有的。尽管青少年中的任何大麻使用都可能减少,但自2007年以来,12-64岁的使用者更频繁使用大麻的相对几率有所增加。研究不仅应评估大麻的使用情况,还应评估使用频率,以针对经常使用者尤其可能出现的大麻不良反应的预防工作。
Objective: Adult cannabis use has increased in the United States since 2002, particularly after 2007, contrasting with stable/declining trends among youth. We investigated whether specific age groups disproportionately contributed to changes in daily and nondaily cannabis use trends. Method: Participants ages 12 and older (N = 722,653) from the 2002-2014 National Survey on Drug Use and Health reported past-year cannabis use frequency (i.e., daily = >= 300 days/year; nondaily = 1-299 days/year; none). Multinomial logistic regression was used to model change in past-year daily and nondaily cannabis use prevalence by age group (i.e., 12-17, 18-25, 26-34, 35-49, 50-64, >= 65), before and after 2007. Multinomial logistic regressions estimated change in relative odds of cannabis use frequency over time by age, adjusting for other sociodemographics. Results: Daily cannabis use prevalence decreased in ages 12-17 before 2007 and increased significantly across adult age categories only after 2007. Increases did not differ significantly across adult ages 18-64 and ranged between 1 and 2 percentage points. Nondaily cannabis use decreased among respondents ages 12-25 and 35-49 before 2007 and increased across adult age categories after 2007, particularly among adults 26-34 (i.e., 4.5 percentage points). Adjusted odds of daily versus nondaily cannabis use increased after 2007 for ages 12-64. Conclusions: Increases in daily and nondaily cannabis use prevalence after 2007 were specific to adult age groups in the context of increasingly permissive cannabis legislation, attitudes, and lower risk perception. Although any cannabis use may be decreasing among teens, relative odds of more frequent use among users increased in ages 12-64 since 2007. Studies should assess not only any cannabis use, but also frequency of use, to target prevention efforts of adverse effects of cannabis that are especially likely among frequent users.