Fig. 3

Internal validation of the prognostic signature and construction of the nomogram. a K–M survival curve in the testing cohort; b ROC curves and AUCs at 1-, 3-, and 5-year survival in the testing cohort; c, d the scatter plot of risk scores and survival status in the testing set; e K–M survival curve in the entire cohort; f ROC curve and AUCs at 1-year, 3-years and 5-years survival in the entire cohort; g, h the scatter plot of risk scores and survival status in the entire set; i evaluation of the predictive value of the cuproptosis-related lncRNA signature for PFS; j forest plot for univariate Cox regression analysis; k Forest plot for multivariate Cox regression analysis; l a hybrid nomogram based on cuproptosis-associated lncRNA signature for OS of HCC patients; m calibration curves of the nomogram to predict the 1-, 3-, and 5-year OS of HCC in all patients