Table 2.

Multinomial logistic regression examining predictors of expected latent class membership

	Binge Alcohol and Cannabis Use Class vs. Limited Polysubstance Use class (Ref)		Opioid Use Class vs. Limited Polysubstance Use Class (Ref)		Opioid Use Class vs. Binge Alcohol and Cannabis Use Class (Ref)
Variable	aOR (95% CI)	p	aOR (95% CI)	p	aOR (95% CI)	p
Gender
Female	Ref		Ref		Ref
Male	2.62 (1.54, 4.47)	<0.001	2.60 (1.25, 5.43)	0.011	0.99 (0.39, 2.50)	0.987
Age
18-25	Ref		Ref		Ref
26-34	0.16 (0.09, 0.28)	<0.001	1.50 (0.50, 4.46)	0.471	9.58 (3.32, 27.66)	<0.001
35 and older	0.02 (0.01, 0.09)	<0.001	1.49 (0.46, 4.85)	0.504	65.24 (10.72, 397.12)	<0.001
Race
Non-Hispanic White	Ref		Ref		Ref
Racial/Ethnic Minority	0.55 (0.31-0.98)	0.044	0.79 (0.38, 1.65)	0.524	1.44 (0.53, 3.87)	0.475
Nonmedical Use Behaviors
No	Ref		Ref		Ref
Yes	1.80 (0.84, 3.85)	0.131	1.36 (0.65, 2.84)	0.421	0.75 (0.27, 2.14)	0.595
Number of Motives for Misuse	1.39 (1.12, 1.73)	0.003	1.54 (1.13, 2.11)	0.006	1.11 (0.79, 1.55)	0.544
Psychological Distress (K6 Score)	1.01 (0.93, 1.10)	0.788	1.22 (1.11, 1.34)	<0.001	1.21 (1.09, 1.34)	<0.001

Note: aOR (95% CI) = adjusted odds ratio with 95% confidence interval. Ref = Reference class for each latent class and nominal covariate.