The significance of preoperative serum carcinoembryonic antigen levels in the prediction of lymph node metastasis and prognosis in locally advanced gastric cancer: a retrospective analysis

Table 2 Diagnostic performances of three serum tumor markers for differentiating GC from benign gastric disease

Group	Cut-off value	Sensitivity	Specificity	Positive predictive value	Negative predictive value	Accuracy	AUC (95%CI)
CEA	1.95 ng/ml	0.707	0.663	0.771	0.585	0.69	0.727(0.681–0.773)
CEA	3.4 ng/ml	0.409	0.942	0.919	0.499	0.614	0.676(0.627–0.725)
CA199	17.12 U/ml	0.843	0.33	0.771	0.439	0.527	0.566(0.513–0.619)
CA199	27 U/ml	0.199	0.942	0.846	0.423	0.484	0.571(0.517–0.624)
CA125	9.675 U/ml	0.488	0.681	0.681	0.488	0.607	0.594(0.540–0.648)
CA125	35 U/ml	0.843	0.33	0.667	0.386	0.4	0.505(0.45–0.56)

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