title: Identifying risk factors in renal allografts before transplant: machine-measured renal resistance and posttransplant allograft survival.
abstract: Enhancement of renal allograft function and survival in an era where expanded criteria donors are increasingly used requires validated selection criteria. The goal of this retrospective study was to evaluate the significance of pretransplant donor and allograft parameters to identify risk factors that can be used in a model to predict 1-year allograft outcomes. Donor demographic factors, donor type, and allograft parameters such as biopsy results and machine-measured renal resistance were correlated with 1-year graft outcome. The Kaplan-Meier method was used to estimate graft survival using the categorical predictors of donor type, donor age, and machine measured renal resistance at 1.5, 3, and 5 hours. The log-rank test was used to test the difference in survival curves between cohorts. The Cox regression analysis was used to estimate hazard ratios for machine-measured renal resistance, donor age, donor terminal creatinine level, donor's estimated glomerular filtration rate, cold ischemia time, and percent glomerulosclerosis. The data show that machine-measured renal resistance at 3 and 5 hours has a statistically significant inverse relationship to 1-year graft survival. All other risk factors had no correlation with 1-year graft survival. The machine-measured renal resistance at 3 hours is the earliest significant predictor of 1-year allograft outcome.
authors.affiliation: New York Organ Donor Network, NY, USA.
authors.forename: Yuriy Y
authors.initials: YY
authors.lastname: Yushkov
authors.forename: Jeffrey
authors.initials: J
authors.lastname: Stern
authors.forename: Alexis
authors.initials: A
authors.lastname: Ying
authors.forename: Nikolina
authors.initials: N
authors.lastname: Icitovic
authors.forename: Steven H
authors.initials: SH
authors.lastname: Dikman
authors.forename: Maunil
authors.initials: M
authors.lastname: Sheth
authors.forename: Michael J
authors.initials: MJ
authors.lastname: Goldstein
mesh_terms: D000328:Adult; D000704:Analysis of Variance; D001706:Biopsy; D005260:Female; D006085:Graft Survival; D006801:Humans; D053208:Kaplan-Meier Estimate; D007677:Kidney Function Tests; D016030:Kidney Transplantation; D008297:Male; D008875:Middle Aged; D018579:Patient Selection; D011237:Predictive Value of Tests; D016016:Proportional Hazards Models; D012189:Retrospective Studies; D012307:Risk Factors