A Univariate cox regression analysis of OS for each pyroptosis-related gene, and 7 genes with P < 0.2. B LASSO regression of the 7 OS-related genes. C Cross-validation for tuning the parameter selection in the LASSO regression. D Distribution of patients based on the risk score. E PCA plot for OCs based on the risk score. F 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). G Kaplan–Meier curves for the OS of patients in the high- and low-risk groups. H ROC curves demonstrated the predictive efficiency of the risk score.