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