CD274 and neoplasm: According to Lu et al., patients with tumor cell PD-L1 expression levels of 50% or more had higher PFS (hazard ratio = 0.34 [95% CI: 0.19 to 0.61]), while the study failed to draw any conclusions for patients with tumor cell PD-L1 expression levels that were below 1% (hazard ratio = 0.73 [95% CI: 0.46 to 1.18]) or between 1% and 49% (hazard ratio = 1.10 [95% CI: 0.53 to 2.28]).