Table 2:

Race and T-Stage at Diagnosis: Results for sequential adjustment sets

	Unadjusted Model			Model 1 (Demographics and Tumor Site)			Model 2 (Addition of Alcohol and Tobacco Use)			Model 3 (Addition of SES Variables)			Model 4 (Addition of Rural/Urban Household Location)
	OR	95% CI	P-Value	OR	95% CI	P-Value	OR	95% CI	P-Value	OR	95% CI	P-Value	OR	95% CI	P-Value
Black race (vs. white race)	2.0	1.5 – 2.5	< 0.001	1.8	1.4 – 2.3	< 0.001	1.7	1.3 – 2.3	< 0.001	1.0	0.8 – 1.5	0.790	1.0	0.7 – 1.4	0.864
Age Category (Relative to < 50)
50–65				0.8	0.6 – 1.1	0.138	0.7	0.5 – 1.0	0.071	0.8	0.6 – 1.1	0.181	0.8	0.5 – 1.2	0.189
65+				0.6	0.4 – 0.8	0.002	0.6	0.4 – 0.8	0.001	0.5	0.3 – 0.9	0.010	0.4	0.2 – 0.8	0.005
Female sex (relative to male)				0.8	0.6 – 1.1	0.105	0.8	0.6 – 1.1	0.236	0.8	0.6 – 1.2	0.326	0.8	0.5 – 1.2	0.358
Site (Relative to larynx/hypopharynx)
Oral cavity				0.8	0.6 – 1.0	0.062	0.8	0.6 – 1.1	0.162	0.8	0.6 – 1.1	0.270	1.1	0.8 – 1.7	0.488
Oropharynx				0.9	0.7 – 1.2	0.510	0.9	0.7 – 1.3	0.613	1.0	0.7 – 1.4	0.942	1.1	0.7 – 1.6	0.765
Smoking (> 10 pack-years)							1.6	1.1 – 2.3	0.008	1.4	1.0 – 2.1	0.070	1.3	0.8 – 2.0	0.336
Alcohol use (any vs. none)							1.0	0.7 – 1.6	0.820	1.2	0.7 – 1.8	0.516	1.3	0.8 – 2.2	0.339
Education (relative to less than high school)
High school graduate										1.1	0.8 – 1.6	0.431	1.1	0.7– 1.6	0.689
Additional education past high school										0.8	0.5 – 1.1	0.133	0.6	0.4 – 0.9	0.012
Insurance (relative to private insurance)
Medicaid/Medicare										1.3	0.8 – 2.0	0.328	1.4	0.8 – 2.4	0209
None										2.5	1.6 – 4.0	<0.001	3.1	1.8 – 5.4	<0.001
Federal										1.8	1.0–3.1	0.047	2.3	1.2–4.4	0.011
Other										1.6	0.9 – 2.8	0.108	1.2	0.6– 2.4	0.612
Income (relative to > 50 K)
Income $20,000 – $50,000										1.1	0.7 – 1.5	0.799	1.0	0.6 – 1.5	0.859
Income < $20,000										1.7	1.1 – 2.7	0.013	1.3	0.8 – 2.1	0.366
Rural Location (relative to metropolitan area)
Micropolitan Area													1.6	1.0 – 2.4	0.046
Rural Area													1.1	0.6 – 2.2	0.688