title: Reassessing Preemptive Kidney Transplantation in the United States: Are We Making Progress?
abstract: Preemptive kidney transplantation (preKT) is associated with higher patient survival, improved quality of life, and lower costs. However, only a minority of patients receives preKT. The aim of this study was to examine changes over the past decade in rates of preKT, focusing on living donor kidney transplantation (LDKT) and specifically recipients who underwent kidney transplantation within 1 year of initiating dialysis.
  
  
  
  Using United Network of Organ Sharing data, we examined retrospectively all kidney transplant candidates (n = 369 103) and recipients (n = 141 254) from 2003 to 2012 in the United States focusing on LDKT (n = 47 108). Predictors of preKT were examined, and patient and graft survival were compared for preKT, pretransplant dialysis less than 1 year, and pretransplant dialysis recipients of 1 year or longer.
  
  
  
  PreKT occurred in only 17% of recipients overall and 31% of LDKT recipients. Medicare patients (odds ratio [OR], 0.29; 95% confidence interval [95% CI], 0.28-0.31), diabetics (OR, 0.75; 95% CI, 0.69-0.80), and minorities (Hispanics OR, 0.62; 95% CI, 0.57-0.68 and African Americans OR, 0.58; 95% CI, 0.53-0.63) were less likely to receive preKT. Dialysis recipients for less than 1 year comprised 30% of nonpreemptive LDKT. Dialysis recipients of less than 1 year had similar patient survival to preKT (5 years: preKT, 94%; dialysis < 1 year, 94%; dialysis ≥ 1 year, 89%; P < 0.01), but decreased death-censored graft survival (5 years: preKT, 93%; dialysis < 1 year, 89%; and dialysis ≥ 1 year, 89%; P < 0.01).
  
  
  
  PreKT remains an unrealized goal for the majority of recipients. Medicare patients, diabetics, and minorities are less likely to receive preKT. Almost one third of nonpreemptive LDKT recipients were dialyzed for less than 1 year, highlighting an important target for improvement.
authors.affiliation: 1 University Transplant Center, University of Texas Health Science Center, San Antonio, TX. 2 Division of Transplant Surgery, Mayo Clinic, Rochester, MN.
authors.forename: Colleen L
authors.initials: CL
authors.lastname: Jay
authors.forename: Patrick G
authors.initials: PG
authors.lastname: Dean
authors.forename: Ryan A
authors.initials: RA
authors.lastname: Helmick
authors.forename: Mark D
authors.initials: MD
authors.lastname: Stegall
mesh_terms: D000328:Adult; D000368:Aged; D048909:Diabetes Complications; D005260:Female; D006085:Graft Survival; D006801:Humans; D007676:Kidney Failure, Chronic / Q000453:epidemiology* / Q000208:ethnology / Q000601:surgery*; D016030:Kidney Transplantation / Q000379:methods*; D019520:Living Donors; D008297:Male; D006278:Medicare; D008875:Middle Aged; D008913:Minority Groups; D016016:Proportional Hazards Models; D011788:Quality of Life; D006435:Renal Dialysis; D012189:Retrospective Studies; D009927:Tissue and Organ Procurement; D016896:Treatment Outcome; D014481:United States; D055815:Young Adult