title: Age-matching in renal transplantation.
abstract: BACKGROUND
  So far, the combined influence of donor age and recipient age on renal allograft survival has not been investigated sufficiently. In this retrospective single-centre study we analysed whether the influence of donor age and recipient age on renal allograft survival are dependent on each other.
  
  
  METHODS
  Data from 1269 cadaveric renal allograft transplantations were evaluated. Paediatric donors (<15 years) and paediatric recipients (<15 years) were excluded. Donors and recipients were divided by age: young donors (yd, </=55 years, n=1093), old donors (od, >55 years, n=176), young recipients (yr, </=55 years, n=1058), and old recipients (or, >55 years, n=211). Functional and actual long-term graft survival (8 years) within the four resulting groups was determined: yd/yr (n=926), yd/or (n=167), od/yr (n=132), and od/or (n=44).
  
  
  RESULTS
  Univariate analysis showed that long-term graft survival of both, kidneys from young donors (functional, 66.1 vs 52.2%, P=0.004; actual, 53.3 vs 46.2%, P=0.065) and kidneys from old donors (functional, 68.7 vs 22.5%, P=0.07; actual, 57.1 vs 20.8%, P=0.15) was better in old recipients as compared to young recipients. Multivariate regression analysis revealed that actual graft survival of kidneys from old donors was significantly reduced in young recipients (od/yr) as compared to all other groups (P=0.001; RR, 1. 97; 95% CI, 1.32-2.94). In this group of patients, graft loss was mainly due to acute (33.7%) and chronic (24.0%) rejection.
  
  
  CONCLUSIONS
  Transplantation of kidneys from 'old' donors into 'young' recipients should be avoided, and these kidneys should be given to age-matched recipients.
authors.affiliation: Department of Nephrology, University Hospital Charité, Campus Charité Mitte, Humboldt-University, Berlin, Germany.
authors.forename: J
authors.initials: J
authors.lastname: Waiser
authors.forename: M
authors.initials: M
authors.lastname: Schreiber
authors.forename: K
authors.initials: K
authors.lastname: Budde
authors.forename: L
authors.initials: L
authors.lastname: Fritsche
authors.forename: T
authors.initials: T
authors.lastname: Böhler
authors.forename: I
authors.initials: I
authors.lastname: Hauser
authors.forename: H H
authors.initials: HH
authors.lastname: Neumayer
mesh_terms: D000208:Acute Disease; D000293:Adolescent; D000328:Adult; D000375:Aging; D002908:Chronic Disease; D006084:Graft Rejection / Q000453:epidemiology; D006085:Graft Survival; D006801:Humans; D015994:Incidence; D016030:Kidney Transplantation; D008875:Middle Aged; D015999:Multivariate Analysis; D012189:Retrospective Studies; D014019:Tissue Donors