CD274 and neoplasm: For OS, age (≥ 65 years vs. < 65 years) (HR 0.33, 95% CI 0.14–0.78, P = 0.012) and tumor PD-L1 CPS (≥ 1% vs. < 1%) (HR 0.44, 95% CI 0.20–0.97, P = 0.040) remained as significant factors after multivariate analysis.