Table 1.

Characteristics of adult primary care patients who completed a screen about past-year cannabis or other drug use, by frequency of use

	Screened for cannabis use							Screened for other drug use
	Overall	By frequency of past-year use					p	Overall	By frequency of past-year use					p
	(N=45,647)	Never (N=39,827)	Less than Monthly (N=2,902)	Monthly (N=886)	Weekly (N=901)	Daily or almost daily (N=1,131)		(N=45,255)	Never (N=44,726)	Less than Monthly (N=381)	Monthly (N=49)	Weekly (N=35)	Daily or almost daily (N=69)
		Column %							Column %
Female	59.6	60.9	55.8	48.4	42.4	46.6	<0.001	59.6	59.7	50.9	36.7	48.6	43.8	<0.001
Age
18–29 years	7.6	5.6	19.5	21.7	22.5	24.5	<0.001	7.5	7.2	36.0	34.7	37.1	50.0	<0.001
30–49 years	19.4	18.4	27.3	26.4	19.3	26.9		19.4	19.3	23.9	16.3	14.3	10.9
50–64 years	27.2	26.9	29.4	30.5	32.0	27.7		27.3	27.3	18.6	18.4	14.3	20.3
≥65 years	45.9	49.2	23.8	21.4	26.2	21.0		45.9	46.1	21.5	30.6	34.3	18.8
Race
American Indian or Alaska Native	0.7	0.7	0.9	0.5	1.2	0.8	<0.001†	0.7	0.7	1.1	0.0	0.0	1.6	0.004†
Asian	7.6	8.4	3.1	2.0	1.7	1.7		7.6	7.7	5.0	0.0	0.0	4.7
Black	2.7	2.7	3.4	3.4	2.4	3.7		2.7	2.7	5.0	0.0	0.0	0.0
Hawaiian or Pacific Islander	0.6	0.6	0.5	0.7	0.6	0.7		0.6	0.6	0.5	0.0	2.9	1.6
Multiracial	2.6	2.3	4.0	4.1	5.3	4.6		2.6	2.6	4.5	8.2	5.7	4.7
Other	2.3	2.4	2.0	2.3	1.4	2.2		2.3	2.3	3.4	0.0	0.0	1.6
White	80.9	80.5	83.6	84.0	84.6	82.7		80.9	80.9	76.9	89.8	91.4	85.9
Unknown	2.6	2.5	2.5	3.2	2.8	3.6		2.6	2.6	3.7	2.0	0.0	0.0
Hispanic or Latino Ethnicity	4.7	4.7	4.9	4.4	3.8	4.8	0.432	4.7	4.7	5.5	4.1	0.0	1.6	0.384†
Diagnoses in prior year
Tobacco use disorder	3.6	3.2	4.8	6.4	7.7	8.0	<0.001	3.6	3.5	5.0	4.1	17.1	14.1	<0.001†
Alcohol use disorder	1.6	1.4	2.2	3.1	3.6	4.2	<0.001	1.6	1.5	3.2	2.0	5.7	9.4	<0.001†
Cannabis use disorder	0.4	0.3	0.7	0.5	0.8	1.5	<0.001	0.4	0.3	0.8	8.2	8.6	25.0	<0.001†
Opioid use disorder	0.5	0.4	0.9	0.8	1.0	1.7	<0.001	0.5	0.4	1.1	8.2	8.6	25.0	<0.001†
Other drug use disorder	0.1	0.1	0.1	0.0	0.3	0.4	0.013†	0.1	0.1	1.1	2.0	5.7	1.6	<0.001†`
Major depression	15.2	14.5	19.0	20.9	18.9	23.6	<0.001	15.2	15.1	18.1	26.5	37.1	28.1	<0.001
Anxiety	10.2	9.5	14.0	16.6	15.8	17.2	<0.001	10.2	10.2	14.4	16.3	14.3	17.2	0.009
Serious mental illness	0.1	0.1	0.1	0.2	0.0	0.2	0.135†	0.1	0.01	0.5	0.0	0.0	0.0	0.118†
Resource Utilization Band (5 categories)
≤ 1	4.1	3.8	7.0	5.9	5.6	4.8	<0.001	4.1	4.1	6.3	6.5	0.0	3.3	<0.001†
2	10.6	10.2	14.6	13.6	13.3	11.2		10.6	10.6	15.8	10.9	2.9	4.9
3	56.7	56.4	58.2	60.6	57.9	59.4		56.7	56.7	59.0	54.4	64.7	52.5
4	19.0	19.6	14.4	14.7	15.8	16.9		19.1	19.1	12.8	26.1	14.7	32.8
5	9.5	10.0	5.9	5.3	7.4	7.7		9.5	9.5	6.3	2.2	17.7	6.6

^†Fisher’s exact used to calculate p-values due to small numbers; all other p-values are calculated with chi-squared test of independence