CD274 and non-small cell lung carcinoma: CT model discrimination of PD-L1 tumor proportion score (TPS) at clinical thresholds of at least 1% (TPS<sub>≥1%</sub>) and at least 50% (TPS<sub>≥50%</sub>) was tested in an external test set of patients with stage IIB-IIIB NSCLC from 35 institutions studied between February 2009 and October 2018 using area under the receiver operating characteristic curve (AUC) analysis.