Table 2.

Results from multilevel multinomial regression predicting substance use type.

						95% CI for OR
Outcome variablea	Predictors	B	SE	p	OR	Lower	Upper
Alcohol and cigarette co-use	Weekend	0.15	0.13	.25	1.17	0.90	1.52
	Coping motives	0.32	0.10	<.01	1.38	1.12	1.69
	Enhancement motives	0.23	0.09	.01	1.26	1.05	1.50
	Sex	−0.39	0.16	.01	0.67	0.49	0.92
	Mean interpersonal stress	0.00	0.06	.94	1.00	0.88	1.12
	Mean academic stress	−0.02	0.03	.55	0.98	0.94	1.04
	Daily interpersonal stress	0.08	0.03	.03	1.08	1.01	1.16
	Daily academic stress	−0.01	0.01	.54	0.99	0.97	1.02
Alcohol and marijuana co-use	Weekend	0.31	0.15	.03	1.37	1.03	1.82
	Coping motives	−0.11	0.10	.27	0.89	0.73	1.09
	Enhancement motives	0.52	0.08	<.01	1.67	1.43	1.97
	Sex	−0.68	0.14	<.01	0.50	0.38	0.67
	Mean interpersonal stress	0.08	0.06	.15	1.09	0.97	1.22
	Mean academic stress	0.00	0.03	.99	1.00	0.95	1.05
	Daily interpersonal stress	−0.01	0.04	.68	0.99	0.92	1.06
	Daily academic stress	−0.03	0.01	.04	0.97	0.94	1.00
Non-alcohol substance use	Weekend	−2.01	0.08	<.01	0.13	0.12	0.15
	Coping motives	0.23	0.10	.02	1.25	1.03	1.52
	Enhancement motives	0.22	0.08	.01	1.24	1.06	1.46
	Sex	−0.70	0.14	<.01	0.50	0.37	0.66
	Mean interpersonal stress	−0.02	0.05	.73	0.98	0.88	1.09
	Mean academic stress	0.04	0.02	.09	1.04	0.99	1.09
	Daily interpersonal stress	−0.03	0.03	.25	0.97	0.92	1.02
	Daily academic stress	0.02	0.01	.02	1.02	1.00	1.03
Alcohol and two or more other substances	Weekend	0.07	0.15	.65	1.07	0.80	1.42
	Coping motives	0.25	0.12	.04	1.28	1.01	1.63
	Enhancement motives	0.37	0.11	<.01	1.44	1.16	1.80
	Sex	−1.19	0.21	<.01	0.30	0.20	0.46
	Mean interpersonal stress	0.03	0.07	.70	1.03	0.89	1.19
	Mean academic stress	0.05	0.03	.15	1.05	0.98	1.12
	Daily interpersonal stress	0.02	0.04	.64	1.02	0.94	1.11
	Daily academic stress	−0.01	0.02	.53	0.99	0.96	1.02

Note.

^aAlcohol-only is reference group.

Sex: 0 = men, 1=women. OR: Odds ratio