Figure 4.

Multivariable Cox regression analysis is performed to select key long non-coding RNAs (lncRNAs) and the distribution of risk score, survival status, and risk heatmap of three prognostic lncRNAs in the training set and clinical validation set, respectively. (A) Hazard ratio of selected key lncRNAs. In the training set, the risk score distribution of three lncRNAs (B); the overall survival status of 439 patients (C); and expression heatmap of three lncRNAs in the low-risk and high-risk groups (D). In the clinical validation set, the risk score distribution of three lncRNAs (E); the overall survival status of 85 patients (F); and expression heatmap of three lncRNAs in the low-risk and high-risk groups (G).