Table 4. Prognostic factors of overall survival by Cox regression analysis.

A: Variable	Hazard ratio	P *
TNM stage (I/II versus III/IV)	0.466 (0.089, 2.44)	0.366
CD26 expression (Low versus High)	1.953 (0.674, 5.656)	0.218
Metastasis status (No Metastasis versus Metastasis)	10.556 (1.731, 64.367)	0.011
Liver Metastasis (No versus Yes)	1.279 (0.392, 4.176)	0.683
B: Variable	Hazard ratio	P *
TNM stage (I/II versus III/IV)	1.029 (0.301, 3.514)	0.964
CD26 expression (Low versus High)	2.967 (1.122, 7.83)	0.028
Liver Metastasis (No versus Yes)	4.897 (1.772, 13.536)	0.002

Values in parentheses are 95% confidence intervals.

*Log rank test