Table 2. Univariate analysis of various clinicopathological features and cumulative 5-year survival rates.

Variables	No. of patients	Cumulative 5-year survival rate (%)	P-value
Age (years)
≦59	202	66.4	0.12
≧60	54	55.1
Gender			0.14
Male	239	62.7
Female	17	81.9
Tumor stage			<0.001*
T1, T2	94	84.0
T3, T4	162	52.3
Nodal stage			<0.001*
N(−)	153	77.1
N(+)	103	44.7
TNM stage
I, II	72	92.4
III, IV	184	54.1	<0.001*
β2M overexpression			<0.001*
Weak	72	92.4
Strong	184	54.1

^*Statistically significant.