Figure 4. The distribution of risk score, DFS, and DFS status in the derivation cohort (A) and validation cohort (B). The black line indicates the optimal cutoff point of the nomogram score used to stratify patients into the low- and high-risk group. Kaplan–Meier curves of the low- and high-risk patients based on the miRNA-based prognostic model in the derivation cohort (C) and validation cohort (D). DFS, disease-free survival.