Trends in Daily Cannabis Use Among Cigarette Smokers: United States, 2002-2014.
OBJECTIVES: To estimate changes in the prevalence of daily cannabis use among current, former, and never cigarette smokers from 2002 to 2014 in the United States. METHODS: The National Survey on Drug Use and Health is a nationally representative cross-sectional study conducted annually among persons aged 12 years and older in the United States. RESULTS: Daily cannabis use occurs nearly exclusively among nondaily and daily cigarette smokers compared with former and never smokers (8.03%, 9.01%, 2.79%, 1.05%, respectively). Daily cannabis use increased over the past decade among both nondaily (8.03%  vs 2.85% ; linear trend P < .001) and daily smokers (9.01% ; 4.92% ; linear trend P < .001). Daily cannabis use increased most rapidly among former cigarette smokers (2.79%  vs 0.98% ; linear trend P < .001). CONCLUSIONS: Daily cannabis use occurs predominantly among cigarette smokers in the United States. Daily cannabis use increased among current, former, and never smokers over the past decade, with particularly rapid increases among youth and female cigarette smokers. Future research is needed to monitor the observed increase in daily cannabis use, especially among youths and adults who smoke cigarettes.
Goodwin, RD; Pacek, LR; Copeland, J; Moeller, SJ; Dierker, L; Weinberger, A; Gbedemah, M; Zvolensky, MJ; Wall, MM; Hasin, DS
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