Table 3. Significant prognostic factors of overall survival by univariate analysis.

Variable	No. of cases	5-year survival (%)	P *
TNM stage:
Stage I/II	64	92.4	0.021
Stage III/IV	78	77.6
Metastasis status:
No metastasis	116	93.1	<0.001
Metastasis	27	44.4
Liver metastasis:
No	123	90.2	<0.001
Yes	30	45

*Log rank test