CD274 and neoplasm: Additionally, a slight improvement in OS was observed with the increase in PD-L1 tumour expression from ≥1% (HR: 0.70; 95% CI, 0.65–0.76) to ≥50% (HR: 0.60; 95% CI, 0.53–0.68) and in PFS from ≥1% (HR: 0.74; 95% CI, 0.65–0.85) to ≥50% (HR: 0.59; 95% CI, 0.49–0.72); however, statistical significance was absent.