Prognostic value of preoperative serum tumor markers in gastric cancer

Table 3 Univariate model for disease-free survival and overall survival by log-rank test

Tumor markers	DFS (P)	OS (P)
CEA (+)	0.197	0.023
CA19-9 (+)	0.236	0.009
CA50 (+)	0.335	0.004
CEA (+) and CA19-9 (+)	0.236	0.026
CA50 (+) and CEA (+)	0.236	0.100
CA19-9 (+) and CA50 (+)	0.236	0.021
CEA (+) and CA19-9 (+) and CA50 (+)	0.397	0.751
CEA (+) or CA19-9 (+) or CA50 (+)	0.302	0.002

CEA: Carcinoembryonic antigen; CA: Carbohydrate antigen; DFS: Disease-free survival; OS: Overall survival.