Value of serum pepsinogen ratio screening for early gastric cancer and precancerous lesions in Youcheng area

Figure 3 Receiver operating characteristic curves. A: The receiver operating characteristic (ROC) curve of pepsinogen ratio in differentiating precancerous lesions from early gastric cancer (EGC); B: The ROC curve of Helicobacter pylori in distinguishing precancerous lesions from EGC; C: The ROC curve of the combined detection in differentiating precancerous lesions from EGC; D: The ROC curve of pepsinogen ratio in distinguishing benign lesions from EGC; E: The ROC curve of Helicobacter pylori in differentiating benign lesions from EGC; F: The ROC curve of the combined detection in distinguishing benign lesions from EGC. PGR: Pepsinogen ratio; HP: Helicobacter pylori.