High efficacy of allogeneic hematopoietic stem cell transplantation (allo-HSCT) in a wide range of malignant and non-malignant hematopoietic disorders system is limited to the risk of serious complications and non-relapse mortality (NRM). Pre-existing comorbidities before allo-HSCT are among key factors for NRM. The purpose of this study was to characterize the potential pre-transplant factors of pulmonary comorbidity and integral indicators of pulmonary function tests (PFT) and to evaluate their prognostic value for the allo-HSCT outcomes in adult patients.