CD274 and lung carcinoma: In univariable analysis, PD‐L1 positivity showed a tendency toward lower lung cancer‐specific (univariable HR = 0.45; 95% CI = 0.070–1.69, P = 0.26) and overall (univariable HR = 0.44; 95% CI = 0.10–1.30, P = 0.15) mortality.