Figure 3. Univariate survival analysis of the hub genes was performed using the Kaplan-Meier curve. (A–B) The gene of CCND1 expression showed obviously significant better DFS and OS in ccRCC samples (Logrank P < .05). (C–D) The expression of the PECAM1/CD31 gene showed a significantly better OS in the ccRCC sample, whereas there was no statistical difference in DFS. Abbreviation: DFS: disease-free survival; OS: overall survival; ccRCC: clear cell renal cell carcinoma.