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Delayed graft function: risk factors and implications for renal allograft survival
1Department of Internal Medicine, University of Michigan School of Medicine, Ann Arbor 48109-0364, USA.
Transplantation
|April 15, 1997
Summary
Delayed graft function (DGF) significantly reduces kidney transplant survival. This condition, linked to longer cold ischemia times, increases rejection risk and long-term graft loss, impacting patient outcomes.
Area of Science:
- Nephrology
- Transplantation Immunology
- Biostatistics
Background:
- Delayed graft function (DGF) is a known complication after kidney transplantation.
- Its impact on long-term renal allograft survival requires further elucidation.
Purpose of the Study:
- To investigate risk factors for non-immediate renal allograft function.
- To determine the consequences of DGF on short- and long-term renal transplant survival.
Main Methods:
- Analysis of 37,216 primary cadaveric renal transplants from the U.S. Renal Data System (1985-1992).
- Utilized unconditional logistic and Cox multivariate regression models.
- Examined relationships between cold ischemia time, DGF, acute rejection, and graft survival.
Main Results:
- Cold ischemia time strongly correlates with DGF risk (23% increase per 6 hours).
- DGF increases acute rejection rates (37% vs. 20%) and is an independent predictor of 5-year graft loss (RR=1.53).
- Combined DGF and early acute rejection result in a 35% 5-year graft survival rate.
Conclusions:
- DGF significantly reduces both short- and long-term kidney allograft survival.
- Delayed function and early rejection have additive adverse effects on graft survival.
- The negative impact of DGF on graft survival is more severe than that of HLA mismatch.