Table 6.

Results from a Cox Proportional Hazards Model examining the effect of adjuvant therapy on the risk of 2-year mortality, adjusting for patient, clinical, and hospital characteristics among patients who received curative surgery. This model excludes patients with missing hospital characteristics (N=1,339).

	Unadjusted models			Full model*
	Hazard ratio	95% CI	P	Hazard ratio	95% CI	P
Receipt of adjuvant therapy
None	1.00	-	Reference	1.00	-	Reference
Radiation only	0.80	0.63–1.02	0.074	0.78	0.61–0.99	0.047
Chemotherapy only	1.16	0.93–1.45	0.188	1.18	0.94–1.49	0.151
Chemoradiation	0.77	0.66–0.89	0.001	0.76	0.65–0.89	0.001

^*Model adjusted for year of diagnosis, age, gender, race, stage, comorbidity, registry, income, and hospital characteristics