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Risk factors for chronic graft-versus-host disease after HLA-identical sibling bone marrow transplantation
K Atkinson1, M M Horowitz, R P Gale
1International Bone Marrow Transplant Registry, Medical College of Wisconsin, Milwaukee 53226.
Insights
Acute graft-versus-host disease (GVHD) is the primary risk factor for developing chronic GVHD after bone marrow transplants. Identifying high-risk patients can guide targeted interventions to improve outcomes.
Area of Science:
- Hematology
- Immunology
- Transplantation Medicine
Background:
- Chronic graft-versus-host disease (GVHD) is a significant complication following allogeneic bone marrow transplantation.
- Understanding risk factors is crucial for predicting and potentially mitigating chronic GVHD incidence.
Purpose of the Study:
- To identify and analyze the key risk factors associated with the development of chronic GVHD in recipients of HLA-identical sibling bone marrow transplants.
- To stratify patient risk based on the severity of acute GVHD and other contributing factors.
Main Methods:
- Retrospective analysis of 2,534 patients undergoing HLA-identical sibling bone marrow transplantation who survived at least 90 days.
- Evaluation of actuarial probability of chronic GVHD within three years post-transplant.
- Statistical analysis to determine the significance of acute GVHD grades and other factors (recipient age, T-cell depletion, donor sex) on chronic GVHD risk.
Main Results:
- The overall 3-year actuarial probability of chronic GVHD was 46%.
- Acute GVHD grade was the most significant predictor, with higher grades correlating to increased chronic GVHD risk (28% for grade 0 to 85% for grade IV).
- In patients with low-grade acute GVHD (0-I), recipient age >20, non-T-cell depleted marrow, and female donor for male recipient independently increased chronic GVHD risk.
Conclusions:
- Acute GVHD severity is the paramount risk factor for chronic GVHD.
- Specific patient and donor characteristics further refine risk assessment in those with minimal or mild acute GVHD.
- These findings can inform the development of targeted prophylactic or therapeutic strategies for high-risk individuals.
Abstract:
Chronic graft-versus-host disease (GVHD) is an important complication of bone marrow transplantation. We analyzed risk factors for chronic GVHD in 2,534 recipients of HLA-identical sibling transplants surviving at least 90 days after transplantation. The actuarial probability of developing chronic GVHD within three years posttransplant was 46% +/- 3% (95% confidence interval). The most important risk factor for chronic GVHD was acute GVHD. The 3-year probabilities of chronic GVHD were 28% +/- 3%, 49% +/- 5%, 59% +/- 6%, 80% +/- 9%, and 85% +/- 15% for persons with grades 0, I, II, III, and IV acute GVHD, respectively (P less than .0001). Among patients with no or grade I acute GVHD, recipient age greater than 20 years, use of non-T-cell depleted bone marrow, and alloimmune female donors for male recipients predicted a higher risk of chronic GVHD. When all three adverse risk factors were present, the probability of chronic GVHD was 62% among persons with no prior acute GVHD and 85% among those with grade I acute GVHD. Among patients with grade II through IV acute GVHD, no other risk factor predicted chronic GVHD. These data identify individuals who might benefit from treatment strategies aimed at changing the incidence of chronic GVHD.