Table 2.

Univariate and multivariate cox analyses to evaluate the prognostic factors for OS

Variable	Univariate analyses			Multivariate analyses
	HR	95% CI	P	HR	95% CI	P
Age			< 0.001
30–49	Reference			Reference
50–69	1.146	0.928–1.414	0.205	1.198	0.969–1.480	0.095
≥ 70	1.626	1.310–2.019	< 0.001	1.767	1.421–2.198	< 0.001
Race			0.060
White	Reference			Reference
Black	1.000	0.873–1.144	0.997	0.962	0.839–1.103	0.579
Others	0.776	0.630–0.955	0.016	0.734	0.595–0.905	0.004
Sex			0.030
Male	Reference			Reference
Female	0.911	0.837–0.992	0.0311	0.887	0.8135–0.966	0.006
T stage			< 0.001
T0	Reference			Reference
T1	1.449	0.970–2.164	0.070	1.343	0.898–2.008	0.151
T2	1.582	1.074–2.330	0.020	1.451	0.984–2.140	0.060
T3	1.830	1.242–2.698	0.002	1.664	1.127–2.456	0.010
T4	1.775	1.210–2.603	0.003	1.623	1.104–2.387	0.014
N stage			< 0.001
N0	Reference			Reference
N1	0.964	0.795–1.168	0.707	0.931	0.768–1.129	0.469
N2	1.242	1.090–1.414	0.001	1.230	1.079–1.402	0.002
N3	1.236	1.068–1.431	0.005	1.220	1.052–1.415	0.009
Marriage			< 0.001
Unmarried	Reference			Reference
Married	0.862	0.792–0.938	< 0.001	0.851	0.780–0.928	< 0.001