Table 2. Univariate analyses of patients’ clinicopathological characteristics affecting overall survival rate after surgery.

Factors	Univariate analysis
	RR	95%CI	p-value
Age
(<70 vs. ≧70)	1.00	0.78-1.28	0.999
Gender
(male vs. female)	0.78	0.47-1.29	0.345
Tumor size stage
(TS1,2 vs. TS3,4)	0.830	0.63-1.12	0.218
Tumor stage
(T1-3 vs. T4)	1.51	0.90-2.48	0.112
Lymph node metastasis
(absent vs. present)	1.01	0.58-1.88	0.961
Lymphatic invasion
(absent vs. present)	1.13	0.35-6.89	0.866
Venous invasion
(absent vs. present)	1.33	0.55-4.40	0.564
Peri-neural invasion
(ne0,1 vs. ne2,3)	1.24	0.72-2.26	0.446
pStage(UICC)
(I, IIA vs. IIB, III, IV)	0.998	0.57-1.85	0.995
RAB5 expression
(Low vs. High)	1.32	1.02-1.74	0.0376*

RR;Relative risk, CI;Confidence interval, * p<0.05.