In addition, multivariate cox-regression analysis identified only 3 DEGs (EFEMP1[hazard ratio {HR}: 1.187, 95%CI: 1.088–1.296, P < .01], GPC2 [HR: 0.706, 95%CI: 0.550–0.907, P < .01], and ITGA3 [HR: 0.797, 95%CI: 0.716–0.888, P < .01]) used to construct prognostic models of BC patients (Fig. 2F, see Fig. S2, supplementary material, shows the KM survival analysis of 3 patient genes) http://links.lww.com/MD/N195. This evidence concerns the gene GPC2 and breast cancer.