A Distribution of patients in the GEO cohort based on the median risk score in the TCGA cohort. B PCA plot for OCs. C The survival status for each patient (low-risk population: on the left side of the dotted line; high-risk population: on the right side of the dotted line). D Kaplan–Meier curves for comparison of the OS between low- and high-risk groups. E Time-dependent ROC curves for OCs.