Fig 1: ROC curve of ApoC-I, TTR and ApoC-III in diagnosing gastric cancer. According to the ROC curves of the expression levels of ApoC-I, TTR and ApoC-III in the serum of patients from the gastric cancer group and benign lesion group, the AUC areas of ApoC-I, TTR and ApoC-III were 0.844 (0.775–0.914), 0.743 (0.651–0.836), and 0.814 (0.738–0.891), respectively, the diagnostic critical values were 11.75 g/l, 189.50 mg/l and 21.19 g/l. ApoC-I, apolipoprotein C-I; TTR, transthyretin; ROC, receptor operating characteristic.