CD274 and neoplasm: In this previous study, the hazard ratio (HR) for overall survival (OS) in the subgroup with tumor PD-L1 expression less than 1% was 1.36 (95% confidence interval [CI]: 0.79–2.34), which was inferior to the OS-HR of 0.53 (95% CI: 0.36–0.77) in the at-least-1% subgroup.