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. Author manuscript; available in PMC: 2019 Oct 1.
Published in final edited form as: Drug Alcohol Depend. 2018 Apr 11;191:355–360. doi: 10.1016/j.drugalcdep.2018.01.040

Table 3.

Prevalence of non-daily cigarette smoking over time from 2002 to 2015 and linear time trends, by cannabis use status (NSDUH)

Cannabis Use Status 2002 2003 2004 2005 2006 2007 2008 2009 2010 2011 2012 2013 2014 2015 Trends
wt% Absolute change Relative change aOR* (95% CI); p-value
Non-daily smoking among total sample 7.39 7.30 7.10 7.18 7.27 7.29 6.94 6.88 7.03 6.52 6.68 6.75 6.70 6.35 −1.04 −14.07 0.99 (0.98, 0.99) <0.001
Daily cannabis users 14.34 16.27 16.43 15.69 17.93 21.14 17.82 16.59 17.10 15.68 16.41 19.29 18.96 17.62 +3.28 +22.87 1.02 (1.01, 1.04) 0.014
Non-daily cannabis users 21.02 20.93 21.21 20.10 19.60 20.30 19.98 21.91 19.34 20.16 18.96 19.23 17.58 17.03 −3.99 −18.98 0.98 (0.97, 0.99) <0.001
Cannabis non-users 6.58 6.47 6.26 6.43 6.50 6.48 6.13 5.92 6.16 5.58 5.77 5.71 5.65 5.36 −1.22 −18.54 0.99 (0.98, 0.99) <0.001
Differential time trend: year as continuous × cannabis use (in 3 categories) F(2,169)=3.21 0.043
Differential time trend: year as continuous × cannabis use (daily use vs. no use) F(1,170)=5.96 0.016
Differential time trend: year as continuous × cannabis use (non-daily use vs. no use) F(1,170)=0.12 0.731
Differential time trend: year as continuous × cannabis use (daily use vs. non-daily use) F(1,170)=6.56 0.011
*

adjusted for sex, age, race/ethnicity, and income