Table 2.

Cox regression analyses of factors associated with CSS.

Variable	Univariate analyses		Multivariate analyses
	HR (95%CI)	P	HR (95%CI)	P
Stage		<0.001		<0.001
Stage IIB	1		1
Stage IIC	1.199 (1.059–1.356)	0.004	1.324 (1.169–1.500)	<0.001
Stage IIIA	0.284 (0.243–0.331)	<0.001	0.336 (0.286–0.394)	<0.001
Age (years)		<0.001		<0.001
≤65	1		1
>65	1.954 (1.730–2.206)		1.524 (1.338–1.736)
Race		0.035		<0.001
White	1		1
Black	1.161 (0.988–1.364)	0.069	1.429 (1.214–1.681)	<0.001
Other	0.840 (0.680–1.038)	0.107	0.956 (0,773–1.183)	0.680
Gender		0.001		0.136
Male	1		1
Female	1.210 (1.081–1.353)		1.090 (0.973–1.221)
Grade		<0.001		<0.001
Grade I/II	1		1
Grade III/IV	1.528 (1.346–1.734)	<0.001	1.349 (1.187–1.533)	<0.001
Unknown	1.079 (0.770–1.513)	0.659	1.250 (0.889–1.758)	0.199
Histology		0.017		0.488
Adenocarcinoma	1		1
Mucinous adenocarcinoma/signet ring cell carcinoma	1.231 (1.038–1.459)		0.941 (0.792–1.118)
No. of examined lymph nodes		<0.001		<0.001
<12	1		1
≥12	0.598 (0.523–0.682)		0.530 (0.464–0.606)
Chemotherapy		<0.001		<0.001
No/unknown	1		1
Yes	0.407 (0.360–0.459)		0.595 (0.522–0.678)