Fig. 6

External validation of the seven-IRGs prognostic risk model. a The survival status and time of male GC patients distributed by risk score in GSE15460. The dotted line is the optimal cut-off value for dividing male GC patients into high- and low-risk groups. b Kaplan-Meier survival curve of male GC patients in the high- and low-risk groups in GSE15460. c Time-dependent ROC curves analysis of the seven-IRGs signature for 1-, 3-, and 5-year OS probability in GSE15460. d Calibration curves of the nomogram for predicting survival at 3-, and 5-years in GSE15460. The nomogram-predicted probability is plotted on the x-axis and the actual survival is plotted on the y-axis