Intention-to-treat Analysis of Patients Aged 70 Years and Older Awaiting Kidney Transplantation in Post-Kidney Allocation System Era

Transplantation. 2023 Dec 1;107(12):2510-2525. doi: 10.1097/TP.0000000000004677. Epub 2023 Jun 16.

Abstract

Background: The US population is aging, and so the number of patients treated for end-stage renal disease is on the rise. In the United States, 38% of people over 65 y old have chronic kidney disease. There continues to be a reluctance of clinicians to consider older candidates for transplant, including early referrals.

Methods: We conducted a retrospective analysis of the Organ Procurement and Transplantation Network database of all adults ≥70 y old undergoing kidney transplants from December 1, 2014, to June 30, 2021. We compared patient and graft survival in candidates who were transplanted while on hemodialysis versus preemptive with a living versus deceased donor kidney transplant.

Results: In 2021, only 43% of the candidates listed for transplant were preemptive. In an intention-to-treat analysis from the time of listing, candidate survival was significantly improved for those transplanted preemptively versus being on dialysis (hazard ratio 0.59; confidence interval, 0.56-0.63). All donor types, donor after circulatory death, donor after brain death, and living donor, had a significant decrease in death over remaining on the waiting list. Patients who were on dialysis or transplanted preemptively with a living donor kidney had significantly better survival than those receiving a deceased donor kidney. However, receiving a deceased donor kidney significantly decreased the chance of death over remaining on the waiting list.

Conclusions: Patients ≥70 y old who are transplanted preemptively, whether with a deceased donor or a living donor kidney, have a significantly better survival than those who are transplanted after initiating dialysis. Emphasis on timely referral for a kidney transplant should be placed in this population.

MeSH terms

  • Adult
  • Aged
  • Aged, 80 and over
  • Graft Survival
  • Humans
  • Intention to Treat Analysis
  • Kidney
  • Kidney Failure, Chronic* / diagnosis
  • Kidney Failure, Chronic* / surgery
  • Kidney Transplantation* / adverse effects
  • Living Donors
  • Retrospective Studies
  • Tissue Donors
  • Tissue and Organ Procurement*
  • United States
  • Waiting Lists