Table 3.

Univariate and multivariate analysis of 5-year overall survival

Variables	Univariate		Multivariate
	5-year OS	P value (log-rank)	Hazard ratio	95%CI	P value
Gender		0.047
Male	279
Female	78
Age (years)		0.159
≤ 65	276
> 65	81
T stage		< 0.001	1.323	1.12–1.53	0.008
T1	40
T2	71
T3	209
T4	37
N stage		< 0.001	1.525	1.4–1.65	< 0.001
N0	155
N1	87
N2	69
N3	46
Vascular invasion		<0.001
No	45
Yes	312
Tumor cell		0.61
G1	54
G2	258
G2	45
Tumor location		0.018	1.361	1.09–1.63	0.025
Upper third	60
Middle third	260
Lower third	37
Adjuvant CRT		0.036
Yes	214
No	143
Tumor length		< 0.001	1.609	1.31–1.9	0.002
≤ 5 cm	236
> 5 cm	157
SIS		< 0.001	1.24	1.05–1.43	0.029
0	119
1	148
2	90
NLR		0.006
≤ 2.27	228
>2.27	129