Figure 3. Construction and evaluation of the predictive 7- miRNA signature. (A) The distribution of the 7-miRNA risk score for each patient. (B) Scatter dot plot for survival rates of patients with BC in low- and high-risk groups. (C) Heatmap for the different expression of prognostic signature-related miRNAs in different risk groups. (D) Kaplan–Meier curve of OS in high- and low-risk groups. (E–G) ROC curves of the 7-miRNA signature for prediction of 1-, 3- and 5-year OS.