CD274 and non-small cell lung carcinoma: The exploratory 2% cutoff identified a subgroup with significantly worse survival in univariable analyses, although it did not retain independent significance in the multivariable analysis.<h4>Conclusions</h4>PD-L1 expression is independently associated with worse survival outcomes in patients with early-stage NSCLC treated with SBRT, indicating its potential as a prognostic biomarker for risk stratification.