Table 2.

Within-survey differences in any nonmedical cannabis use, frequent nonmedical use, and DSM-IV cannabis use disorder among U.S. adults with and without pain, 2001–2002 and 2012–2013^a

Cannabis Outcome	Comparison by Pain Status, 2001–2002				Comparison by Pain Status, 2012–2013
	Risk Difference	95% CIb	Risk Ratio	95% CIc	Risk Difference	95% CIb	Risk Ratio	95% CIc
Any nonmedical used	1.41	0.65, 2.17	1.38	1.15, 1.62	3.40	2.22, 4.58	1.38	1.22, 1.54
Frequent nonmedical usee	0.24	−0.14, 0.62	1.22	0.85, 1.63	1.59	0.75, 2.43	1.46	1.19, 1.74
DSM-IV cannabis use disorder	0.42	0.01, 0.84	1.31	0.94,1.82	1.43	0.63, 2.23	1.52	1.21, 1.87

^aData are from the 2001–2002 National Epidemiologic Survey on Alcohol and Related Conditions (NESARC) survey and the 2012–2013 NESARC-III survey. Comparisons are adjusted for sociodemographic covariates (age, gender, race/ethnicity, education level, marital status, and family income) and pain-by-covariate interactions.

^bRisk differences whose 95% confidence intervals do not include 0.0 are statistically significant at p<0.05 and are in boldface.

^cRisk ratios whose 95% confidence intervals do not include 1.0 are statistically significant at p<0.05 and are in boldface.

^dNonmedical use was defined as cannabis use without a prescription or other than prescribed, for example, to get high.

^eFrequent use was defined as cannabis use at least three times a week.