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J Am Soc Nephrol. 2017 Sep;28(9):2749-2755. doi: 10.1681/ASN.2016101084. Epub 2017 Apr 27.

Quantifying Postdonation Risk of ESRD in Living Kidney Donors.

Author information

1
Department of Surgery, Johns Hopkins University School of Medicine, Baltimore, Maryland.
2
Department of Epidemiology, Johns Hopkins School of Public Health, Baltimore, Maryland.
3
Department of Surgery, University of Alabama at Birmingham, Birmingham, Alabama; and.
4
Scientific Registry of Transplant Recipients, Minneapolis Medical Research Foundation, Minneapolis, Minnesota.
5
Department of Surgery, Johns Hopkins University School of Medicine, Baltimore, Maryland; dorry@jhmi.edu.

Abstract

Studies have estimated the average risk of postdonation ESRD for living kidney donors in the United States, but personalized estimation on the basis of donor characteristics remains unavailable. We studied 133,824 living kidney donors from 1987 to 2015, as reported to the Organ Procurement and Transplantation Network, with ESRD ascertainment via Centers for Medicare and Medicaid Services linkage, using Cox regression with late entries. Black race (hazard ratio [HR], 2.96; 95% confidence interval [95% CI], 2.25 to 3.89; P<0.001) and male sex (HR, 1.88; 95% CI, 1.50 to 2.35; P<0.001) was associated with higher risk of ESRD in donors. Among nonblack donors, older age was associated with greater risk (HR per 10 years, 1.40; 95% CI, 1.23 to 1.59; P<0.001). Among black donors, older age was not significantly associated with risk (HR, 0.88; 95% CI, 0.72 to 1.09; P=0.3). Greater body mass index was associated with higher risk (HR per 5 kg/m2, 1.61; 95% CI, 1.29 to 2.00; P<0.001). Donors who had a first-degree biological relationship to the recipient had increased risk (HR, 1.70; 95% CI, 1.24 to 2.34; P<0.01). C-statistic of the model was 0.71. Predicted 20-year risk of ESRD for the median donor was only 34 cases per 10,000 donors, but 1% of donors had predicted risk exceeding 256 cases per 10,000 donors. Risk estimation is critical for appropriate informed consent and varies substantially across living kidney donors. Greater permissiveness may be warranted in older black candidate donors; young black candidates should be evaluated carefully.

KEYWORDS:

ESRD; kidney donation; risk factors

PMID:
28450534
PMCID:
PMC5576930
DOI:
10.1681/ASN.2016101084
[Indexed for MEDLINE]
Free PMC Article

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