KM curves for survival description by PFTs. The vertical axis represents survival probability. (A) OS KM curves by pulmonary comorbidity. (B) OS KM curves by FEV1. (C) OS KM curves by DLCO. (D) PFS KM curves by pulmonary comorbidity. (E) PFS KM curves by FEV1. (F) PFS KM curves by DLCO.