Fig. 2

The construction of a prognostic signature in HCC patients. a, b According to minimum criteria, four cuproptosis-associated lncRNAs were selected by LASSO regression model; c coefficients; d K–M survival analysis showing that the high-risk group had poor prognosis and shorter overall survival in the training set; e ROC curve and AUCs at 1-, 3- and 5-year survival for the prognostic signature; f, g the scatter plot of risk scores and survival status in the training set; h the correlations between cuproptosis-associated genes and the four prognostic cuproptosis-associated lncRNAs in the proposed signature; i–m: risk and clinical correlation analysis (grade, gender, stage, T stage, and age are related to the risk score, P < 0.05)