Risk factors for acute graft-versus-host disease

Area of Science:

• Hematology
• Immunology
• Transplantation Medicine

Background:

• Acute graft-versus-host disease (GvHD) is a significant complication following bone marrow transplantation.
• Precise identification of risk factors for acute GvHD remains challenging and debated.

Purpose of the Study:

• To identify and analyze risk factors associated with the development of acute GvHD in recipients of HLA-identical sibling bone marrow transplants.
• To provide data for estimating individual patient risk and designing clinical trials for GvHD prevention.

Main Methods:

• Analysis of data from 2036 patients undergoing HLA-identical sibling transplants for leukemia or aplastic anemia.
• Reproducible grading of GvHD into absent/mild versus moderate/severe categories.
• Statistical analysis to determine relative risks and significance of potential predictive factors.

Main Results:

• The 2-year actuarial probability of GvHD was 54% for absent/mild and 46% for moderate/severe.
• Female donor to male recipient transplants significantly increased GvHD risk (RR 2.0, P<0.001), especially if donors were parous or transfused (RR 2.9, P<0.0001).
• Older patients showed a modest increased risk (RR 1.6, P<0.001), but age was not significant when specific female donor factors were excluded. Cyclosporine and methotrexate were equally effective in prophylaxis.

Conclusions:

• Donor-recipient sex match and donor parity/transfusion history are significant risk factors for moderate to severe acute GvHD.
• Cyclosporine and methotrexate demonstrate efficacy in GvHD prophylaxis.
• These findings aid in risk stratification and inform future GvHD prevention strategies.