CD274 and lung carcinoma: In multivariable Cox regression analysis, PD‐L1 positivity was independently associated with lower lung cancer‐specific (multivariable HR = 0.24; 95% CI = 0.058–0.67; P = 0.0039) and overall (multivariable HR = 0.29; 95% CI = 0.11–0.61; P = 0.0006) mortality.