title: Effect modification in liver allografts with prolonged cold ischemic time.
abstract: Although prolonged cold ischemia time (PCIT) is generally associated with worse outcomes following liver transplantation, evidence suggests that some recipients and some donors might be more sensitive to PCIT than others. The purpose of this study was to identify factors that predict a higher risk of graft loss after a transplant with PCIT when compared with a similar transplant with average CIT (ACIT). 14 637 recipients reported to United Network for Organ Sharing (UNOS) in the model for end-stage liver disease (MELD) era were studied by interaction term analysis in proportional hazards models. Recipient diabetes, obesity and donor African American (AA) ethnicity were found to significantly amplify the adverse effects of PCIT. Graft loss was 1.85-fold higher in diabetic or obese PCIT recipients compared with diabetic or obese ACIT recipients, (vs. 1.17 for the same comparison in non-diabetic non-obese recipients). Similarly, graft loss was 1.80-fold higher in AA PCIT donors compared with AA ACIT donors, (vs. 1.31 for the same comparison in non-AA donors). Other factors may also exist, but current clinical practices might already mitigate the risks from those factors. As such, we recommend expanding clinical practice to include our findings, but not abandoning current judgment based on factors already perceived to amplify the adverse effects of PCIT.
authors.affiliation: Department of Surgery, The Johns Hopkins University School of Medicine, Baltimore, MD, USA. dorry@jhmi.edu
authors.forename: D L
authors.initials: DL
authors.lastname: Segev
authors.forename: L M
authors.initials: LM
authors.lastname: Kucirka
authors.forename: G C
authors.initials: GC
authors.lastname: Nguyen
authors.forename: A M
authors.initials: AM
authors.lastname: Cameron
authors.forename: J E
authors.initials: JE
authors.lastname: Locke
authors.forename: C E
authors.initials: CE
authors.lastname: Simpkins
authors.forename: P J
authors.initials: PJ
authors.lastname: Thuluvath
authors.forename: R A
authors.initials: RA
authors.lastname: Montgomery
authors.forename: W R
authors.initials: WR
authors.lastname: Maley
mesh_terms: D000328:Adult; D050377:Cold Ischemia / Q000009:adverse effects* / Q000379:methods*; D048909:Diabetes Complications / Q000175:diagnosis; D005260:Female; D006084:Graft Rejection / Q000453:epidemiology* / Q000209:etiology; D006085:Graft Survival; D006801:Humans; D016031:Liver Transplantation; D008297:Male; D008875:Middle Aged; D009765:Obesity / Q000150:complications / Q000175:diagnosis; D011379:Prognosis; D012307:Risk Factors; D014184:Transplantation, Homologous; D016896:Treatment Outcome