Table 4. Multivariable analysis of clinicopathologic and ethnic variables associated with DSS using a Cox proportional hazards model for four age groups and four disease-stage groups.

	Age, years
	50		50–59		60–69		≥70
	Hazard Ratio	P	Hazard Ratio	P	Hazard Ratio	P	Hazard Ratio	P
	Stage I
Ethnic group
NHW	Referent		Referent		Referent		Referent
Black	1.39	<0.0001	1.24	<0.0001	1.13	<0.0001	1.13	<0.0001
HW	0.72	0.03	0.75	0.001	0.97	0.56	0.98	0.65
Asian	0.86	0.27	0.83	0.008	0.77	<0.0001	0.90	<0.0001
	Stage II
Ethnic group							Referent
NHW	Referent		Referent		Referent
Black	1.26	0.03	1.05	0.43	1.06	0.25	1.03	0.47
HW	0.54	0.04	0.98	0.85	0.94	0.50	0.98	0.80
Asian	1.19	0.32	0.95	0.63	0.91	0.21	0.88	0.03
	Stage III
Ethnic group
NHW	Referent		Referent		Referent		Referent
Black	1.03	0.32	1.09	<0.0001	1.06	0.001	1.01	0.40
HW	0.88	0.03	1.02	0.61	0.99	0.62	1.01	0.82
Asian	0.89	0.04	0.89	<0.0001	0.88	<0.0001	0.90	<0.0001
	Stage IV
Ethnic group
NHW	Referent		Referent		Referent		Referent
Black	1.05	0.01	1.03	0.03	1.00	0.96	0.98	0.04
HW	0.79	<0.0001	0.89	<0.0001	0.94	0.001	0.95	0.002
Asian	0.76	<0.0001	0.73	<0.0001	0.79	<0.0001	0.86	<0.0001