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Am J Kidney Dis. 2010 Nov;56(5):961-70. doi: 10.1053/j.ajkd.2010.06.024. Epub 2010 Sep 25.

Delayed graft function and the risk of death with graft function in living donor kidney transplant recipients.

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  • 1Division of Nephrology and the Kidney Transplant Program, Toronto General Hospital, University Health Network, Toronto, Ontario, Canada.

Abstract

BACKGROUND:

The link between delayed graft function (DGF) and death with graft function (DWGF) in living donor kidney transplant recipients presently is unknown.

STUDY DESIGN:

Retrospective cohort study.

SETTING & PARTICIPANTS:

44,630 adult living donor kidney recipients (first transplants only) in the US Renal Data System from January 1, 1994, to December 31, 2004.

PREDICTOR:

DGF, defined as the need for dialysis therapy in the first week after transplant.

OUTCOME:

Time to DWGF.

MEASUREMENTS:

Kaplan-Meier curves were constructed to assess the impact of DGF on DWGF. Recipients with DGF were 1:1 propensity score matched to those without DGF, and time-dependent Cox proportional hazards models were used to examine factors associated with DWGF. Subgroup and sensitivity analyses also were conducted.

RESULTS:

DWGF occurred in 3,878 patients during 3.9 years' (median) follow-up. In patients with DGF, survival with graft function at 1, 3, 5, and 10 years was 91.9%, 86.8%, 81.6%, and 61.7%, respectively (in patients without DGF, these values were 98.0%, 95.2%, 91.6%, and 80.1%, respectively; P < 0.001 compared with the DGF group). In a fully adjusted time-dependent Cox model, HRs for DWGF in patients with DGF (vs without DGF) were 6.55 (95% CI, 4.78-8.97), 3.55 (95% CI, 2.46-5.11), 2.07 (95% CI, 1.53-2.81), and 1.48 (95% CI, 1.26-1.73) at 0-1, 1-3, 3-12, and longer than 12 months posttransplant, respectively. Propensity score analysis showed similar results. Inferences were unchanged after adjustment for kidney function and acute rejection at 6 months and 1 year posttransplant. Cardiovascular and infectious causes of DWGF were more prevalent in patients with DGF. The association was more marked in female recipients and robust to various sensitivity analyses.

LIMITATIONS:

The impact of lesser decreases in early graft function could not be evaluated.

CONCLUSIONS:

DGF is associated with an increased risk of DWGF in living donor kidney recipients. The mechanisms underlying this relation require further study.

Copyright © 2010 National Kidney Foundation, Inc. Published by Elsevier Inc. All rights reserved.

PMID:
20870331
[PubMed - indexed for MEDLINE]
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