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. Author manuscript; available in PMC: 2020 Apr 1.
Published in final edited form as: Drug Alcohol Depend. 2019 Feb 14;197:134–140. doi: 10.1016/j.drugalcdep.2019.01.010

Table 2.

Prevalence of past 30-day daily cannabis use by SPD status (National Survey on Drug Use and Health, 2008–2016, adults age 18 and older)

2008 2009 2010 2011 2012 2013 2014 2015 2016 Linear Trend
wt % aOR* (95% CI); p-value aOR** (95% CI) p-value
Full analytic sample 1.67 1.88 2.15 2.10 2.33 2.56 2.84 2.73 2.77 1.08 (1.06, 1.09) <0.001 1.09 (1.08, 1.10) <0.001
No SPD 1.62 1.79 2.11 2.03 2.27 2.41 2.75 2.66 2.66 1.08 (1.06, 1.09) <0.001 1.09 (1.08, 1.11) <0.001
Past-month SPD 3.89 5.06 4.72 5.44 5.81 7.78 8.09 7.26 8.07 1.10 (1.07, 1.12) <0.001 1.11 (1.08, 1.15) <0.001
Differential time trend: year as continuous x past year SPD status F(1,110)=1.55 0.216 F(1,110)=1.42 0.235

Key: aOR, adjusted odds ratio; CI, confidence interval; SPD, serious psychological distress; wt %, weighted percentage

*

Adjusted for gender, age, race/ethnicity, and total annual family income

**

Adjusted for gender, age, race/ethnicity, total annual family income, and heavy alcohol use (i.e., drinking 5 or more drinks on the same occasion on each of 5 or more days in the past 30 days)