New York University Grossman School of Medicine, Department of Population Health, 180 Madison Avenue, New York, NY, 10016, United States.
New York University Grossman School of Medicine, Department of Population Health, 180 Madison Avenue, New York, NY, 10016, United States; New York University College of Dentistry, 345 East 24th Street, New York, NY, 10010, United States.
Drug Alcohol Depend. 2021 Feb 1;219:108494. doi: 10.1016/j.drugalcdep.2020.108494. Epub 2021 Jan 5.
Prevalence of cannabis use has been increasing among select subgroups in the US; however, trend analyses typically examine prevalence of use across years. We sought to determine whether there is seasonal variation in use.
We conducted a secondary analysis of the National Survey on Drug Use and Health, a repeated cross-sectional survey of nationally representative probability samples of noninstitutionalized populations age ≥12 in the US. Quarterly trends in any past-month cannabis use were estimated using data from 2015-2019 (N = 282,768).
Prevalence of past-month cannabis use increased significantly from 2015 to 2019 from 8.3%-11.5%, a 38.2 % increase (P < 0.001). Prevalence increased across calendar quarters on average from 8.9 % in January-March to 10.1 % in October-December, a 13.0 % increase (P < 0.001). Controlling for survey year and participant demographics, each subsequent quarter was associated with a 6% increase in odds for use (aOR=1.06, 95 % CI: 1.04-1.07). There were significant increases by quarter among all subgroups of sex, race/ethnicity, education, and among most adult age groups (Ps<0.05), with a 52.7 % increase among those age ≥65. Prevalence also significantly increased among those without a medical cannabis prescription and those not proxy-diagnosed with cannabis use disorder (Ps<0.01), suggesting recreational use may be driving increases more than medical or more chronic use. Those reporting past-year LSD or blunt use in particular were more likely to report higher prevalence of use later in the year (a 4.9 % and 3.3 % absolute increase, respectively; Ps<0.05).
The prevalence of cannabis use increases throughout the year, independently of annual increases.
在美国的某些特定群体中，大麻的使用已经呈上升趋势；然而，趋势分析通常是检查多年来的使用流行率。我们试图确定使用是否存在季节性变化。
我们对国家药物使用和健康调查进行了二次分析，该调查是对美国年龄在 12 岁及以上的非机构化人群进行的全国代表性概率样本的重复横断面调查。使用 2015-2019 年的数据（N=282768），估计了过去一个月任何大麻使用的季度趋势。
从 2015 年到 2019 年，过去一个月大麻使用的流行率从 8.3%上升到 11.5%，增长了 38.2%（P<0.001）。平均而言，在日历季度中，流行率从 1 月至 3 月的 8.9%上升到 10 月至 12 月的 10.1%，增加了 13.0%（P<0.001）。在控制调查年份和参与者人口统计学特征的情况下，每后续季度与使用的几率增加 6%相关（调整后的优势比[aOR]=1.06，95%置信区间[CI]：1.04-1.07）。在所有性别、种族/民族、教育水平和大多数成年年龄组中，每一季度都有显著增加（P<0.05），65 岁以上人群增加了 52.7%。在没有医用大麻处方和未代理诊断为大麻使用障碍的人群中，流行率也显著增加（P<0.01），这表明娱乐性使用可能比医用或更慢性使用更能推动使用率的增加。特别是那些报告过去一年使用 LSD 或钝器的人，更有可能在今年晚些时候报告更高的使用率（绝对增加分别为 4.9%和 3.3%；P<0.05）。
大麻的使用流行率全年都在增加，与年度增加无关。
