401. The Simplified Comorbidity Index (SCI)– a new tool for prediction of non-relapse mortality in allogeneic HCT
- Author
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Shouval, Roni, Fein, Joshua A., Cho, Christina, Avecilla, Scott T., Ruiz, Josel, Tomas, Ana Alarcon, Sanchez-Escamilla, Miriam, Flores, Nerea Castillo, Segundo, Lucrecia Yáñez San, Barker, Juliet N., Dahi, Parastoo, Giralt, Sergio A., Geyer, Alexander I., Gyurkocza, Boglarka, Jakubowski, Ann A., Lin, Richard J., O'Reilly, Richard J., Papadopoulos, Esperanza B., Politikos, Ioannis, Ponce, Doris M., Sauter, Craig S., Scordo, Michael, Shaffer, Brian, Shah, Gunjan L., Sullivan, James P., Tamari, Roni, van den Brink, Marcel R.M., Young, James W., Nagler, Arnon, Devlin, Sean, Shimoni, Avichai, and Perales, Miguel-Angel
- Abstract
Individual comorbidities have distinct contributions to non-relapse mortality (NRM) following allogeneic hematopoietic cell transplantation (allo-HCT). We studied the impact of comorbidities both individually and in combination in a single-center cohort of 573 adult patients who underwent CD34-selected allo-HCT following myeloablative conditioning. Pulmonary disease, moderate to severe hepatic comorbidity, cardiac disease of any type, and renal dysfunction were associated with increased NRM in multivariable Cox regression models. A Simplified Comorbidity Index (SCI) composed of the four comorbidities predictive of NRM,as well as age> 60 years, stratified patients into five groups with a stepwise increase inNRM. NRM rates ranged from 11.4% to 49.9% by stratum, with adjustedhazard ratios of 1.84, 2.59, 3.57, and 5.38. The SCI was also applicable in an external cohort of 230 patientswho underwent allo-HCT with unmanipulated grafts following intermediate-intensity conditioning. The areaunder the ROC curve (AUC)of the SCI for 1-year NRM was 70.3 and 72.0 over the development and external-validation cohorts, respectively; corresponding AUCs of the Hematopoietic Cell Transplantation-specific Comorbidity Index (HCT-CI) were 61.7 and 65.7. In summary, a small setof comorbidities, aggregated into the Simplified Comorbidity Index, are highly predictive of NRM. The new index stratifies patients into distinct risk groups, was validated in an external cohort, and provides higher discrimination than the HCT-CI.
- Published
- 2021
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