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Blood, 15 February 2005, Vol. 105, No. 4, pp. 1408-1416. Prepublished online as a Blood First Edition Paper on October 14, 2004; DOI 10.1182/blood-2004-06-2385.
CLINICAL OBSERVATIONS, INTERVENTIONS, AND THERAPEUTIC TRIALS Comparison of graft-versus-host-disease and survival after HLA-identical sibling bone marrow transplantation in ethnic populationsFrom the GVHD/Immune Reconstitution Working Committee of the International Bone Marrow Transplant Registry (IBMTR), Health Policy Institute, Medical College of Wisconsin, Milwaukee, WI; INOUE Memorial Hospital, Chiba, Japan; Huddinge University Hospital, Sweden; Japan Adult Leukemia Study Group, Tokyo Metropolitan Komagome Hospital, Japan; Chiba University Hospital, Chuo-Ku, Japan; Saiseikai Maebashi Hospital, Maebashi, Japan; Keio University School of Medicine, Tokyo, Japan; Dana-Farber Cancer Institute, Boston, MA; University of California at San Diego, La Jolla; Southmead Hospital, Clifton, Bristol, United Kingdom; University of Southern California/Norris Cancer Center, Los Angeles; Baylor University Medical Center, Dallas, TX; Center for Advanced Studies in Leukemia, Los Angeles, CA; The Children's Hospital, Denver, CO; Hammersmith Hospital, London, United Kingdom; St Jude Children's Research Hospital, Memphis, TN; Children's Hospital Medical Center, Cincinnati, OH; National Heart, Lung and Blood Institute, National Institutes of Health, Bethesda, MD; University of Munich, Germany; Mayo Clinic, Rochester, MN; Roswell Park Cancer Institute, Buffalo, NY; Children's Hospital of Orange County, Orange, CA; Hospital Saint Louis, Paris, Cedex, France; and Inserm U645 Etablissement Francais du Sang, Besancon, France.
The association of ethnicity with the incidence of graft-versus-host disease (GVHD) and other clinical outcomes after transplantation is controversial. We compared the results of HLA-identical sibling bone marrow transplantations for leukemia, performed between 1990 and 1999, among different ethnic populations, including 562 Japanese, 829 white Americans, 71 African Americans, 195 Scandinavians, and 95 Irish. Results for adults and children were analyzed separately. Multivariate analyses of adult patients showed that white Americans, African Americans, and Irish cohorts were at significantly higher risk for acute GVHD than Japanese or Scandinavian cohorts (relative risk [RR] = 1.77, P < .001; RR = 1.84, P < .006; RR = 2.22, P < .001, respectively). White Americans, African Americans, and Irish, but not Scandinavians, were at significantly higher risk for early (within 3 months of transplantation) transplant-related mortality (TRM) compared with Japanese (RR = 2.99, P < .001; RR = 5.88, P < .001; RR = 2.66, P < .009, respectively). No differences in the risk for chronic GVHD, relapse, and overall survival were noted. In the pediatric cohort (limited to Japanese and white Americans), white Americans were at significantly higher risk for acute (RR = 1.93; P = .04) and chronic (RR = 3.16; P = .002) GVHD. No differences in other clinical outcomes were noted. Our findings suggest that ethnicity may influence the risk for GVHD, though overall survival rates after transplantation remain similar.
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