Table 2.

Multivariable Logistic Regression for Smoking Status

Characteristic/Behavior	Nondaily Smokers vs. Non-smokers Ψ			Daily Smokers vs. Non-smokersΨ			Nondaily Smokers vs. Daily SmokersΨΨ
	AOR*	95% CI*	p-value	AOR*	95% CI*	p-value	AOR*	95% CI*	p-value
Demographic Factors
Gender
Females vs. Males	0.95	0.79–1.16	0.636	0.99	0.76–1.29	0.944	0.96	0.72–1.28	0.797
Age	1.03	0.99–1.07	0.203	1.15	1.10–1.21	<0.001	0.89	0.84–0.94	<0.001
Race: Non-Hispanic White (referent)
African-American	0.82	0.54–1.26	0.374	0.33	0.15–0.75	0.008	2.52	1.04–6.14	0.041
Hispanic	1.00	0.61–1.65	0.999	0.83	0.37–1.85	0.642	1.24	0.52–2.93	0.628
Asian/Pacific-Islander	1.40	0.86–2.30	0.177	1.42	0.66–3.04	0.373	0.76	0.33–1.73	0.511
Other	0.81	0.49–1.34	0.411	0.53	0.25–1.12	0.097	1.34	0.58–3.11	0.495
Mother’s education level
4 yr. College degree or higher vs. Some college or less (referent)	1.26	1.01–1.56	0.038	0.91	0.68–1.22	0.533	1.41	1.02–1.93	0.035
Father’s education level
4 yr. College degree or higher vs. Some college or less (referent)	1.02	0.82–1.27	0.876	1.05	0.78–1.41	0.754	1.02	0.74–1.40	0.912
Contextual Factors
Residence location:
On vs. Off campus (referent)	1.03	0.82–1.29	0.827	0.96	0.70–1.31	0.778	1.09	0.77–1.54	0.622
Fraternity/Sorority member	1.16	0.86–1.56	0.328	0.62	0.36–1.07	0.088	1.79	1.02–3.14	0.043
College Campus
Private vs. Public (referent)	0.67	0.44–1.01	0.055	0.21	0.10–0.43	<0.001	3.29	1.61–6.72	0.001
Health Risk Behaviors
Drank alcohol in past 30 days	2.59	1.78–3.79	<0.001	1.52	0.94–2.45	0.084	1.53	0.83–2.82	0.178
High-Risk Drinking
Binge drank in past 30 days	2.57	1.87–3.53	<0.001	1.71	1.08–2.69	0.021	1.37	0.82–2.30	0.230
Gets drunk in a typical week	1.73	0.93–3.22	0.084	0.90	0.29–2.73	0.847	1.98	0.60–6.58	0.264
Both binge drank & gets drunk Neither (referent)	4.26	3.22–5.63	<0.001	3.45	2.33–5.13	<0.001	1.18	0.75–1.84	0.481
Marijuana use in past 30 days	2.93	2.36–3.63	<0.001	3.62	2.68–4.88	<0.001	0.78	0.58–1.07	0.124
Illegal drug use, ever	1.59	1.27–1.99	<0.001	2.94	2.20–3.92	<0.001	0.54	0.39–0.73	<0.001
Had multiple sexual partners in past 30 days	1.92	1.42–2.62	<0.001	2.63	1.77–3.91	<0.001	0.72	0.49–1.06	0.093

Note.

^*AOR = Adjusted Odds Ratio; 95% CI = 95% Confidence Interval for AOR;

^ΨPolytomous clustered logistic regression with Non-smokers as referent group;

^ΨΨDichotomous clustered logistic regression with Daily smokers as referent group