Fig. 2From: Serum CD26 levels in patients with gastric cancer: a novel potential diagnostic markerROC curve for sCD26. ROC curve for sCD26 showed an area under the curve of C = 0.738 with SE = 0.071 and 95 % CI from 0.598–0.877. The best cut-off that maximizes (sensitivity + specificity) was 465.8 pg/mLBack to article page