Fig. 3

Establishment and validation of a 4 lncRNAs model. A LASSO Cox analysis of 21 lncRNA in intersection. B λ selection diagram. The two dotted lines indicated two particular values of λ. The left side was λmin and the right side was λ1se. The λmin was selected to build the model for accuracy in our study. C Clustering analysis heatmap shows the display levels of the 4 lncRNAs for each patient in the testing set. D Distribution of 4 lncRNAs model-based risk score for training set (left) and validation set (right). E Patients’ survival status in training set (left) and validation set (right). The x-axis is the patient ranking in ascending order by the ferroptosis risk score; the y-axis is the survival time. The red dots represent patients who died, and the green dots represent the surviving patients