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Original article

Vol. 143 No. 4546 (2013)

Risk factors and outcome of expanded-criteria donor kidney transplants in patients with low immunological risk

  • Claudia Praehauser
  • Patricia Hirt-Minkowski
  • Kiymet Saydam Bakar
  • Patrizia Amico
  • Eliane Vogler
  • Stefan Schaub
  • Michael Mayr
DOI
https://doi.org/10.4414/smw.2013.13883
Cite this as:
Swiss Med Wkly. 2013;143:w13883
Published
03.11.2013

Summary

QUESTIONS UNDER STUDY: The aim of this study was to evaluate risk factors and outcome of expanded-criteria donor (ECD) kidney transplants in patients with low immunological risk.

METHODS: We evaluated graft survival and graft function in 265 recipients with low immunological risk defined as the absence of pretransplant donor-specific HLA antibodies.

RESULTS: A total of 112 (42%) kidneys derived from ECD and 153 (58%) from standard-criteria donors (SCDs). Overall, in a multivariate Cox regression, ECD status was the only significant risk factor for graft failure (hazard ratio [HR] 2.31, 95% confidence interval [CI] 1.22–4.37; p = 0.01). In the SCD group there was an increased risk for graft failure with increasing recipient age (HR 1.06 per year, CI 1.01–1.10; p = 0.02) and in the ECD group a trend for risk reduction for recipients treated with tacrolimus (Tac) (HR 0.46, CI 0.20‒1.06; p = 0.07). One, three and five-year graft survival of ECD kidneys was significantly better when recipients were treated with Tac (95%, 88% and 72%, respectively) than when they were treated without Tac (73%, 65% and 50%, respectively) (p = 0.008). At three years, ECD kidneys had a lower median estimated creatinine clearance (eCrCl) than SCD kidneys (37 vs 58 ml/min, p <0.001). Within the ECD group, recipients treated with Tac had a higher median eCrCl than those treated without Tac (41 ml/min vs 33 ml/min, p = 0.004). Graft function from one to three years was preserved in ECD recipients treated with Tac (median change 0.0 ml/min, p = 0.4) compared with those treated without Tac (median change –3.2 ml/min, p = 0.005).

CONCLUSION: Tac-based immunosuppression seems to improve graft survival and to preserve graft function in ECD kidneys with low immunological risk.

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