Figure 4. The validity of prognostic signature and the relationship between the risk score and fibroblast content. (A) Univariate COX regression analysis in TCGA. (B) Univariate COX regression analysis in GSE39582. (C) Multivariate COX regression analysis in TCGA. (D) Multivariate COX regression analysis in GSE39582. (E) The receiver operating characteristic (ROC) curve and the areas under the curve verified the accuracy of prognostic signature in the training and testing groups. (F) The risk score is associated with the fibroblast content.