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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.
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Submitted July 6, 2004
Accepted October 4, 2004
Comparison of graft-vs-host-disease and survival after HLA-identical sibling bone marrow transplantation in different ethnic populations
Hakumei Oh*, Fausto R Loberiza Jr., Mei-Jie Zhang, Olle Ringden, Hideki Akiyama, Takayoshi Asai, Shuichi Miyawaki, Shinichiro Okamoto, Mary M Horowitz, Joseph H Antin, Asad Bashey, Jennifer M Bird, Matthew H Carabasi, Joseph W Fay, Robert P Gale, Roger H Giller, John M Goldman, Gregory A Hale, Richard E Harris, Jean Henslee-Downey, Hans-Jochem Kolb, Mark R Litzow, Philip L McCarthy, Steven M Neudorf, Derek S Serna, Gerard Socie, Peter Tiberghien, and A J Barrett
INOUE Memorial Hospital, Chiba, Japan
GVHD/Immune Reconstitution Working Committee of the International Bone Marrow Transplant Registry (IBMTR), Health Policy Institute, Medical College of Wisconsin, Milwaukee, Wisconsin, USA
Huddinge University Hospital, Huddinge, Sweden
Japan Adult Leukemia Study Group, Tokyo Metropolitan Komagome Hospital, Tokyo, Japan
Chiba University Hospital, Chiba, Japan
Saiseikai Maebashi Hospital, Maebashi, Japan
Keio University School of Medicine, Tokyo, Japan
Dana-Farber Cancer Institute, Boston, Massachusetts, USA
University of California-San Diego, La Jolla, California, USA
Southmead Hospital, Clifton, Bristol, United Kingdom
University of Southern California/Norris Cancer Center, Los Angeles, California, USA
Baylor University Medical Center, Dallas, Texas, USA
Center for Advanced Studies in Leukemia, Los Angeles, California, USA
The Children's Hospital-Denver, Denver, Colorado, USA
Hammersmith Hospital, London, United Kingdom
St. Jude Children's Research Hospital, Memphis, Tennessee, USA
Children's Hospital Medical Center, Cincinnati, Ohio, USA
National Heart, Lung and Blood Institute, National Institute of Health, Bethesda, Maryland, USA
University of Munich, Munich, Germany
Mayo Clinic Rochester, Rochester, Minnesota, USA
Roswell Park Cancer Institute, Buffalo, New York, USA
Children's Hospital of Orange County, Orange, California, USA
Hospital Saint Louis, Paris, Cedex, France
Inserm U645 Etablissement Francais du Sang, Besancon, France
* Corresponding author; email: hakumei{at}chive.ocn.ne.jp.
The association between ethnicity and the incidence of graft-versus-host disease (GVHD) and other clinical outcomes is controversial. We compared results of HLA-identical sibling bone marrow transplants for leukemia among different ethnic populations, including 562 Japanese, 829 Caucasian Americans, 71 African Americans, 195 Scandinavians and 95 Irish, performed between 1990 and 1999. Results in adults and children were analyzed separately. Multivariate analyses of adult patients showed that Caucasian, African Americans and Irish had significantly higher risks of acute GVHD than Japanese or Scandinavians (relative risk [RR] 1.77, p<0.0001, RR 1.84, p<0.006, RR 2.22, p<0.001, respectively). Caucasian Americans, African Americans and Irish, but not Scandinavian patients had a significantly higher risk of early (1st 3 months after transplant) transplant-related mortality (TRM) compared with Japanese (RR 2.99, p<0.0001, RR 5.88, p<0.0001, RR 2.66, p<0.009, respectively). No differences in the risk of chronic GVHD, relapse, and overall survival were noted. In the pediatric cohort (limited to Japanese and Caucasian Americans), Caucasian Americans had a significantly higher risk of acute (RR 1.93, p=0.04) and chronic (RR 3.16, p=0.002) GVHD. No differences in other clinical outcomes were noted. Our findings suggest that ethnicity may influence the risk of GVHD, although overall survival after transplantation remains similar.

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