Moreover, multivariate regression analysis showed that PDL-1 (OR:13.825, p = 0.004), CTLA-4 (OR: 20.958, p = 0.010), PD-1(OR:10.550, p = 0.044), MIC-B (OR: 17.89, p = 0.003), miR-155 (OR: 211.356, P < 0.001), and miR-195 (OR:0.006, P < 0.001) were considered as independent risk factors for BC (Table 5). The gene discussed is PDCD1; the disease is breast cancer.