Table 4.

Cox proportional hazard regression analysis for disease free survival

Characteristics	Univariate analysis				Multivariate analysis
	HR	95% CI		P value	HR	95% CI		P value
		Lower	Upper			Lower	Upper
Gender	1.320	0.788	2.212	0.291
Age	0.773	0.462	1.296	0.329
Tumor size	1.845	1.085	3.138	0.024
Differentiation degree	2.541	1.479	4.367	0.001	2.617	1.369	5.002	0.004
Tumor location	1.092	0.925	1.289	0.299
T stage	4.186	2.265	7.737	<0.001
N stage	1.828	1.337	2.499	<0.001
M stage	3.414	1.826	6.380	<0.001
TNM stage	1.925	1.390	2.665	<0.001
KIF23 expression	3.109	1.673	5.778	<0.001	2.889	1.409	5.924	0.004

Abbreviations: HR, hazard ratio; CI, confidence interval.