CD4 and neoplasm: The risk factors with p values less than 0.1 in the univariate analysis, including T classification (p = 0.014), N classification (p < 0.001), M classification (p < 0.001), stage classification (p = 0.001), necrosis stage (p = 0.040), tumor-infiltrating immune cells (p = 0.073), CD4 (p = 0.059), FoxP3 (p = 0.036), CD8 (p = 0.064), PD-L1 (p = 0.050), FoxP3/CD8 (p = 0.022), and CD8/CD4 (p = 0.055), were selected for a Cox proportional hazards regression model for multivariate analysis.