Fig. 4

Internal validation of the predictive signature. A, B a. Risk score distribution of patients with GC using the nine-lncRNA signature. b. Scatter plots showing the survival of GC patients. c. Heatmap of the expression of the nine lncRNAs in the high-risk and low-risk groups. C, D Kaplan–Meier survival curves showing the difference in OS between low-risk and high-risk patients. E, F. ROC curves of the nine-lncRNA signature at 2, 3 and 4 years. A, C, and E show the results for the training cohort, and B, D, and F show the results for the total cohort