Figure 2. Construction of a DRGs model in TCGA set. (A) The LASSO regression analysis to filter out prognosis-related DRGs. (B) The multivariate Cox regression analysis to develop a DRGs model. (C–G) Survival analysis of 5 candidate DRGs (ACTB, FLNB, NCKAP1, SLC3A2, SLC7A11). (H) The correlation network of 5 candidate DRGs. (I) Patients in different risk groups gathering in two areas in PCA analysis. Abbreviations: LASSO: Least absolute shrinkage and selection operator; PCA: Principal component analysis.