Table 5.

Cox multivariable regression of variables independently associated with survival.

		95% Confidence Interval
Predictor	Hazard Ratio	Lower	Upper	p-value
Age (per year)	1.02	1.00	1.05	0.02
Sex (female)	0.79	0.52	1.20	0.27
Race (reference: White)
Black	3.17	0.93	10.8	0.07
Other	0.84	0.20	3.53	0.81
Year of diagnosis (per year)	0.98	0.92	1.05	0.60
CDCC score (reference: 0)
1	1.09	0.78	1.52	0.63
2+	1.07	0.63	1.82	0.81
Insurance status (reference: government)
Private	0.67	0.45	1.01	0.06
None	1.60	0.37	6.89	0.53
Facility type (reference: non-academic)
Academic/Research Program	0.91	0.67	1.24	0.54
Pathologic T stage (reference: T2)
T3 or T4a	1.56	1.11	2.21	0.01
Tumor size (per mm)	1.00	0.99	1.01	0.90
Grade (reference: moderately differentiated)
Well differentiated	0.46	0.26	0.82	0.009
Adjuvant radiation (reference: none)	0.89	0.29	2.71	0.84
Type of adjuvant therapy (reference: none)
Chemotherapy with or without radiation	1.03	0.36	2.92	0.95

CDCC indicates Charlson-Deyo Comorbidity Index