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Elsawy M, Storer BE, Milano F, Sandmaier BM, Delaney C, Salit RB, Rashad AH, Woolfrey AE, Appelbaum FR, Storb R, Sorror ML. Prognostic Performance of the Augmented Hematopoietic Cell Transplantation-Specific Comorbidity/Age Index in Recipients of Allogeneic Hematopoietic Stem Cell Transplantation from Alternative Graft Sources. Biol Blood Marrow Transplant 2018; 25:1045-1052. [PMID: 30500442 DOI: 10.1016/j.bbmt.2018.11.030] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/16/2018] [Accepted: 11/25/2018] [Indexed: 01/11/2023]
Abstract
The Hematopoietic Cell Transplantation-Specific Comorbidity Index (HCT-CI) was developed and validated to weigh the burden of pretransplantation comorbidities and estimate their impact on post-transplantation risks of nonrelapse mortality (NRM). Recently, the HCT-CI was augmented by the addition of both age and the values of 3 markers: ferritin, albumin, and platelet count. So far, research involving The HCT-CI has been limited almost exclusively to recipients of allogeneic hematopoietic cell transplantation (HCT) from HLA-matched grafts. To this end, we sought to investigate the discriminative capacity of an augmented comorbidity/age index among 724 recipients of allogeneic HCT from HLA-mismatched (n = 345), haploidentical (n = 117), and umbilical cord blood (UCB; n = 262) grafts between 2000 and 2013. In the overall cohort, the augmented comorbidity/age index had a higher c-statistic estimate for prediction of NRM compared with the original HCT-CI (.63 versus .59). Findings were similar for recipients of HLA-mismatched (.62 versus .59), haploidentical (.60 versus .54), or UCB grafts (.65 versus .61). Compared with patients with an HCT-CI score ≥4, those with a score <4 had a higher survival rate among recipients of HLA-mismatched (55% versus 39%; P < .0008), HLA-haploidentical (58% versus 38%; P = .01), or UCB (67% versus 48%; P = .004) grafts. Our results demonstrate the utility of the augmented comorbidity/age index as a valid prognostic tool among recipients of allogeneic HCT from alternative graft sources.
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Affiliation(s)
- Mahmoud Elsawy
- Clinical Research Division, Fred Hutchinson Cancer Research Center; Seattle, Washington; Division of Hematology, Department of Medicine, Dalhousie University, Halifax, Nova Scotia, Canada
| | - Barry E Storer
- Clinical Research Division, Fred Hutchinson Cancer Research Center; Seattle, Washington; Department of Biostatistics, University of Washington School of Public Health, Seattle, Washington
| | - Filippo Milano
- Clinical Research Division, Fred Hutchinson Cancer Research Center; Seattle, Washington; Division of Medical Oncology, Department of Medicine, University of Washington School of Medicine; Seattle, Washington
| | - Brenda M Sandmaier
- Clinical Research Division, Fred Hutchinson Cancer Research Center; Seattle, Washington; Division of Medical Oncology, Department of Medicine, University of Washington School of Medicine; Seattle, Washington
| | - Colleen Delaney
- Clinical Research Division, Fred Hutchinson Cancer Research Center; Seattle, Washington; Division of Medical Oncology, Department of Medicine, University of Washington School of Medicine; Seattle, Washington
| | - Rachel B Salit
- Clinical Research Division, Fred Hutchinson Cancer Research Center; Seattle, Washington; Division of Medical Oncology, Department of Medicine, University of Washington School of Medicine; Seattle, Washington
| | | | - Ann E Woolfrey
- Clinical Research Division, Fred Hutchinson Cancer Research Center; Seattle, Washington; Division of Medical Oncology, Department of Medicine, University of Washington School of Medicine; Seattle, Washington
| | - Frederick R Appelbaum
- Clinical Research Division, Fred Hutchinson Cancer Research Center; Seattle, Washington; Division of Medical Oncology, Department of Medicine, University of Washington School of Medicine; Seattle, Washington
| | - Rainer Storb
- Clinical Research Division, Fred Hutchinson Cancer Research Center; Seattle, Washington; Division of Medical Oncology, Department of Medicine, University of Washington School of Medicine; Seattle, Washington
| | - Mohamed L Sorror
- Clinical Research Division, Fred Hutchinson Cancer Research Center; Seattle, Washington; Division of Medical Oncology, Department of Medicine, University of Washington School of Medicine; Seattle, Washington.
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