CD274 and neoplasm: The effect was particularly more pronounced in those with PD-L1 positive tumors (PD-L1 ≥ 1%) (HR 0.66; 95% CI 0.50–0.88; p = 0.0039), especially when PD-L1 was expressed on 50% or more of tumor cells (HR 0.43; 95% CI 0.27–0.68).