CEACAM5 and gastric cancer: The AUC of CEA for predicting GC metastasis was 0.647 [95% confidence interval (CI): 0.62–0.674, P < 0.001], of CA19-9 was 0.649 (95% CI: 0.622–0.675, P < 0.001), of CA72-4 was 0.662 (95% CI: 0.636–0.688, P < 0.001) and of NLR was 0.679 (95% CI: 0.653–0.705, P < 0.001).