Validate the stability of the risk signature. (A–C), ROC curves of 1-, 2-, 3-year overall survival for risk score and other clinical features. (D), The concordance index (c-index) for the risk score and other clinical features. (E–H), The Kaplan-Meier survival curves of risk signature in different subtypes of patients. (I), PCA of all genes. (J), PCA of CRGs. (K), PCA of CRLs. (L), PCA of risk score. (M), The nomogram constructed by risk score and other clinical features. (N), 1-, 2-, 3-year overall survival calibration curves of all samples. ***p < 0.001; **p < 0.01; *p < 0.05.