Table 3. Cox-regression analysis for overall survival of colon cancer patients.

Variable	HR	95% CI	P value
Age	1.044	0.763 ± 1.471	0.102
Location	1.143	0.947 ± 1.702	0.162
Differentiation	1.374	0.792 ± 2.553	0.125
pT	1.425	1.223 ± 3.029	0.031*
TNM stage#	2.348	1.855 ± 4.512	0.015*
PPA1 expression	1.391	1.113 ± 3.106	0.038*

* indicates statistically significant (P<0.05).