Table 5.

Adjusted relative risk ratios from multivariable multinomial logistic regressions of latent class membership on covariates: Comparisons with the Alcohol-Only Use class

	SAMa-Lighter Use		Concurrent Use
	(vs. Alcohol Only)		(vs. Alcohol Only)
	ARRb	p	ARR	p
Gender (ref = female)
Male	1.06	0.045	1.06	0.081
Race/Ethnicity (ref = White)
Black/African American	0.96	0.440	1.68	<.001
Hispanic	0.80	<.001	1.10	0.118
Other Races	0.83	<.001	1.07	0.264
Parent Education (ref = high school or less)
Some college	1.18	<.001	1.08	0.041
High school grades (ref = B- or better)
C+ or worse	1.39	<.001	1.51	<.001
Four-year college graduation plans (ref = no definite plans to graduate)
Definitely plan to graduate	0.92	0.003	0.86	<.001
Evenings out (ref = fewer than 3)
Three or more evenings out/week	1.48	<.001	1.33	<.001
Truancy (ref = no cutting class in past month)
Any classes cut in past month	1.88	<.001	1.64	<.001
Illicit drug use other than marijuana (IOTM) (ref = no past 12-month use)
Any past 12-month IOTM use	6.97	<.001	4.04	<.001
Cohort (ref = 2006-2016)
1976-1985	0.91	0.042	0.77	<.001
1986-1995	0.60	<.001	0.42	<.001
1996-2005	0.84	<.001	0.75	<.001

Note: Unweighted N=84,805. All covariates entered simultaneously and included missing data indicators; estimates for missing indicators not shown. Bold entries represent associations significant at p < .01.

^aSAM = simultaneous alcohol and marijuana use.

^bARR = Adjusted risk ratio.