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The impact of donor and recipient weight incompatibility on renal transplant outcomes

  • Nephrology - Original Paper
  • Published:
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Abstract

Background

Donor/recipient size mismatching and correlation to allograft outcome remains poorly defined. This study assessed the impact of donor body weight (DBW) to recipient body weight (RBW) ratio on allograft function and survival.

Methods

A total of 898 deceased donor renal transplant recipients were included in the study. Patients were divided into quartiles depending on the ratio of DBW/RBW: Q1 (≤ 0.88), Q2 (0.89–1.00), Q3 (1.01–1.22) and Q4 (> 1.22). Donor and recipient characteristics were obtained from the national kidney transplant service database. Serum creatinine and estimated glomerular filtration rate (eGFR) at 1 and 5 years after transplant were compared.

Results

Q4 patients had a higher eGFR 1 year post-transplant (median 59.5 ml/min, IQR 46.8–76.2) compared to Q1–Q3 which had median eGFRs of 54.3, 54.8 and 55.3 ml/min, respectively (p < 0.001). At 5 years post-transplant, there were modest differences in the eGFR across the four quartiles, Q1–4 with median eGFRs of 56.9, 61.1, 61.2 and 58.6 ml/min, respectively (p = 0.02). However, there were no significant differences in 1- and 5-year allograft survival between groups.

Conclusions

In the setting of deceased donor renal transplantation, mismatching of donor to recipient weight had no impact on 5-year allograft survival, but a low DBW/RBW ratio is modestly associated with lower eGFR.

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Funding

This research did not receive any specific grant form funding agencies in the public, commercial or not-to-profit sectors.

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Authors and Affiliations

  1. Department of Nephrology and Transplantation, Beaumont Hospital, Dublin 9, Ireland

    Limy Wong, Patrick O’Kelly, Donal J. Sexton, Conall M. O’Seaghdha, Colm Magee & Peter J. Conlon

  2. Department of Transplantation and Urology, Beaumont Hospital, Dublin, Ireland

    Aileen Counihan & Dilly Little

  3. Royal College of Surgeons in Ireland, Dublin, Ireland

    Colm Magee & Peter J. Conlon

Authors
  1. Limy Wong
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  2. Aileen Counihan
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  3. Patrick O’Kelly
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  4. Donal J. Sexton
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  5. Conall M. O’Seaghdha
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  6. Colm Magee
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  7. Dilly Little
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Correspondence to Limy Wong.

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The authors declare that they have no conflict of interest.

Ethical approval

All procedures performed in studies involving human participants were in accordance with the ethical standards of the institutional and/or national research committee and with the 1964 Helsinki declaration and its later amendments or comparable ethical standards. For this type of study formal consent is not required.

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Wong, L., Counihan, A., O’Kelly, P. et al. The impact of donor and recipient weight incompatibility on renal transplant outcomes. Int Urol Nephrol 50, 551–558 (2018). https://doi.org/10.1007/s11255-017-1745-1

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  • DOI: https://doi.org/10.1007/s11255-017-1745-1

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