Figure 4 Predicted performance of the identified prognostic signature in the testing datasets (GSE30219: A–C; GSE41271: D–F; GSE42127: G–I). (A, D, G) The Kaplan-Meier survival analysis of the 7-gene prognostic signature. The same cutoff value in the training set is applied. (B, E, H) The multiple ROC curves comparing risk score with other clinical factors. ROC curve – receiver operating characteristic curve; AUC – area under the ROC curve. (C, F, I) The forest plots for multivariate survival analysis combining risk score and clinical factors. The hazard ratio and 95% confidence interval are presented.