Abstract
Although graft failure (GF) is a fatal complication after allogeneic stem cell transplantation (SCT), no mortality risk assessments after salvage SCT have been reported. We developed a comprehensive prognostic scoring system consisting of patient and comorbidity factors with 470 patients as a training cohort out of 940; these patients underwent salvage SCT for GF. The multivariate analysis demonstrated that older age, poorer performance status, a continuation of antimicrobial treatment, and severe organ dysfunction were independently associated with worse overall survival (OS) and non-relapse mortality (NRM). Based on each factor’s hazard ratio, weighted scores of 1–3 were assigned to these factors. Using the summed scores (0–8), a prognostic scoring system successfully stratified outcomes after salvage SCT in the cohort. For patients in the low (0–2, n = 122), intermediate (3–4, n = 209), and high score (5–8, n = 110) groups, the 1-year OS was 62.8%, 40.8%, and 14.2%, respectively (P < 0.001), whereas the 1-year NRM was 24.1%, 43.9%, and 72.7%, respectively (P < 0.001). The prognostic value of the scoring system was confirmed in the validation cohort (n = 470). Our scoring system is useful for predicting survival after salvage SCT.
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Clinical data were provided by the Transplant Registry Unified Management Program 2 of the Japanese Data Center for Hematopoietic Cell Transplantation. Restrictions are applicable to the availability of the data, which were used under license for this study.
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Acknowledgements
The authors thank all the physicians and staff at the transplant centers who provided the clinical data to the Transplant Registry Unified Management Program of the Japan Society of Hematopoietic Cell Transplantation. The authors also thank Enago (www.enago.jp) for the English language review. This work was supported in part by the Practical Research Project for Allergic Diseases and Immunology (Research Technology of Medical Transplantation) from the Japan Agency for Medical Research and Development, AMED under Grant Number 18ek0510023h0002. KH, SK, SF, YN, KY, and HN designed this study on behalf of the transplant complication working group in the Japan Society for Hematopoietic Cell Transplantation. KH performed all analyses and wrote the first draft. SK, SF, YN, KY, NU, MO, KI, SY, NS, KM, YO, MS, ST, TK, TF, JK, YA, and HN contributed to data interpretation and correction of the draft. All authors approved the final manuscript.
Funding
This work was supported in part by the Practical Research Project for Allergic Diseases and Immunology (Research Technology of Medical Transplantation) from the Japan Agency for Medical Research and Development, AMED under Grant Number 18ek0510023h0002.
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Our study protocol was approved by the institutional review board of the Tokai University School of Medicine.
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Harada, K., Kimura, Si., Fuji, S. et al. Prognostic factors in salvage transplantation for graft failure following allogeneic hematopoietic stem cell transplantation. Bone Marrow Transplant 56, 2183–2193 (2021). https://doi.org/10.1038/s41409-021-01310-0
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DOI: https://doi.org/10.1038/s41409-021-01310-0
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