Table 1.

Results from multivariate models predicting momentary alcohol use or cigarette use from the other drug and occasion- and person-level covariates.

Predictor	Dependent Measure
	Alcohol Use			Cigarette Use
	OR	95% CI	p	OR	95% CI	p
Cigarette Use	1.22	1.04, 1.42	.015	--	--	--
Alcohol Use	--	--	--	1.40	1.18, 1.67	<.001
Occasion-Level Covariates
Time of Day
Midnight–4 a.m.	1.49	1.19, 1.86	<.001	11.70	9.15, 14.96	<.001
4 a.m. – 8 a.m.	0.11	0.06, 0.20	<.001	7.95	5.80, 10.91	<.001
8-a.m. – 12 p.m.	0.05	0.03, 0.07	<.001	1.29	1.16, 1.44	<.001
12.p. – 4 p.m.	0.09	0.08, 0.11	<.001	1.15	1.06, 1.26	.001
4 p.m. – 8 p.m.	0.32	0.29, 0.36	<.001	1.13	1.04, 1.23	.003
8 p.m–Midnight (Reference)	1.00	--	--	1.00	--	--
Weekend	1.95	1.75, 2.17	<.001	0.83	0.78, 0.89	<.001
Others Present	2.23	1.91, 2.60	<.001	1.20	1.11, 1.29	<.001
Location
Bar/Restaurant	11.38	9.30, 13.92	<.001	1.14	0.97, 1.34	.113
Home	1.51	1.29, 1.77	<.001	1.37	1.25, 1.49	<.001
Outside	1.48	1.26, 1.75	<.001	4.06	3.67, 4.49	<.001
Vehicle	0.60	0.47, 0.76	<.001	3.25	2.89, 3.64	<.001
Other Location	2.76	2.29, 3.31	<.001	1.20	1.07, 1.35	.002
Work/School (Reference)	1.00	--	--	1.00	--	--
Person-Level Covariates
Male	1.07	0.86, 1.34	.547	1.08	0.84, 1.39	.536
Body Mass Indexa	1.01	0.99, 1.03	.325	0.99	0.98, 1.02	.808
FTNDa	0.96	0.91, 1.02	.163	1.41	1.33, 1.50	<.001
AUDITa	1.05	1.03, 1.07	<.001	1.01	0.98, 1.03	.675
Age
18–20 years	0.29	0.19, 0.44	<.001	0.89	0.55, 1.43	.624
21–30 years	0.49	0.33, 0.73	<.001	1.26	0.81, 1.96	.312
31–40 years	0.56	0.33, 0.94	.028	1.42	0.80, 2.51	.231
41+ years (Reference)	1.00	--	--	1.00	--	--

Note: OR = Odds ratio, CI = Confidence Interval, FTND = Fagerstrom Test for Nicotine Dependence, AUDIT= Alcohol Use Disorder Identification Test.

^aPredictor centered prior to model entry.