CD274 and non-small cell lung carcinoma: When key clinical factors were incorporated into multivariable logistic regression, PD-L1 positivity and advanced stage emerged as the strongest adverse determinants of DFS, whereas platinum-based chemotherapy conferred a marked protective effect, consistent with the established prognostic impact of PD-L1 expression, stage, and adjuvant treatment in NSCLC [32,33,34,35].