Table 3.

Cox proportional hazards analysis of cancer-specific survival

	Unmatched cohort			P	Matched cohort			P
	HR	95% CI			HR	95% CI
Univariate
Age	1.019	1.017	1.021	<0.001	1.017	1.012	1.021	<0.001
Age groups	1.361	1.312	1.411	<0.001	1.329	1.219	1.449	<0.001
Race	1.024	0.990	1.060	0.168	1.035	0.954	1.124	0.406
Sex	1.065	1.019	1.113	0.004	0.991	0.887	1.107	0.874
Grade	1.739	1.684	1.795	<0.001	1.701	1.552	1.866	<0.001
T	2.705	2.618	2.795	<0.001	2.438	2.252	2.640	<0.001
N	2.414	2.351	2.478	<0.001	2.325	2.172	2.488	<0.001
Stage	2.735	2.642	2.832	<0.001	2.520	2.316	2.742	<0.001
Sidedness	0.857	0.818	0.897	<0.001	0.997	0.890	1.117	1
Multivariate
Age	1.023	1.021	1.025	<0.001	1.021	1.017	1.025	<0.001
Race	1.039	1.004	1.076	0.002	1.016	0.936	1.102	0.713
Sex	0.973	0.931	1.102	0.217	0.956	0.856	1.068	0.430
Grade	1.410	1.363	1.458	<0.001	1.444	1.310	1.529	<0.001
Stage	2.725	2.629	2.824	<0.001	2.502	2.294	2.728	<0.001
Sidedness	0.969	0.924	1.017	0.199	0.980	0.874	1.098	0.723

HR hazard ratio, CI confidence interval