The results from the Kaplan-Meier Plotter demonstrated that low CXCL9 expression was correlated with shorter OS in breast cancer (Figure 3A, HR=0.75, P<0.01), which was consistent with the results of OS (Figure 3B, P<0.01), DFS (Figure 3C, P<0.01), and PFS (Figure 3D, P<0.01) in the UCSC Xena database. This evidence concerns the gene CXCL9 and breast cancer.