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Graft and Patient Survival after A2-Incompatible Deceased Donor Kidney Transplantation

S. Getsin, P. Chiang, S. Yu, K. Jackson, D. Segev, A. Massie

Johns Hopkins School of Medicine, Baltimore, MD

Meeting: 2020 American Transplant Congress

Abstract number: D-023

Keywords: Graft survival, Mortality

Session Information

Date: Saturday, May 30, 2020

Session Name: Poster Session D: Kidney Deceased Donor Selection

Session Time: 3:15pm-4:00pm

 Presentation Time: 3:30pm-4:00pm

Location: Virtual

Related Abstracts
  • Impact of the New Kidney Allocation System A2/A2B –> B Policy on Access to Transplantation among Minority Candidates
  • Graft and Patient Survival after A2-Incompatible Living Donor Kidney Transplantation

*Purpose: The Kidney Allocation System (KAS), implemented in 2014, increased offers of ABO type A2 donor kidneys to type O and B recipients, and A2B to B recipients (A2i). While previous studies showed no increased risk associated with A2I transplantation, these were studies of very highly selected patients with low sample size. It is important to understand if prior results are comparable to those of the post-KAS era to ensure the safety of patients undergoing this procedure.

*Methods: Using SRTR data 2000-2018, we identified adult, first-time kidney transplant recipients with blood type O or B who underwent ABO-compatible or A2i deceased donor kidney transplantation (DDKT). A2i was defined as using an A2 kidney for an O recipient or an A2 or A2B kidney for a B recipient. Inverse probability weighted Cox regression was used to compare post-transplantation mortality, all-cause graft failure, and death-censored graft failure between A2i and compatible recipients.

*Results: Out of 93703 recipients, 993 (1%) underwent A2i DDKT, of which 738 (74%) were post-KAS. One-year, 5-year, and 10-year patient survival were 96%, 84%, and 64% among compatible DDKT recipients and 96%, 87%, and 65% among A2i transplant recipients (p=0.6, Figure). Patient mortality was comparable between A2i and compatible DDKT recipients (wHR 0.700.921.22, p=0.6). There was no evidence of difference between A2i versus compatible DDKT recipients with regards to all-cause graft failure (wHR 0.881.121.44, p=0.3) and death-censored graft failure (wHR 0.951.271.72, p=0.1).

*Conclusions: Among almost 1000 A2i recipients across the United States, there is no evidence of harm resulting from prioritizing A2i DDKT in the KAS era.

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To cite this abstract in AMA style:

Getsin S, Chiang P, Yu S, Jackson K, Segev D, Massie A. Graft and Patient Survival after A2-Incompatible Deceased Donor Kidney Transplantation [abstract]. Am J Transplant. 2020; 20 (suppl 3). https://atcmeetingabstracts.com/abstract/graft-and-patient-survival-after-a2-incompatible-deceased-donor-kidney-transplantation/. Accessed March 9, 2021.

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