title: Significance of age in the survival of diabetic patients after kidney transplantation.
abstract: BACKGROUND
  In recent years acceptance of diabetic patients for renal replacement therapy has increased. Renal transplantation for Type I diabetic patients is widely accepted but the appropriate treatment for Type II diabetic patients is still a matter of dispute. Our study was done to determine whether the age of Type II diabetic patients constituted an additional risk factor.
  
  
  METHODS
  We analyzed the outcome of renal transplantation in 56 diabetic patients, 31 Type I and 25 Type II diabetics (we excluded any who had combined kidney-pancreas transplants). We compared them with 51 non-diabetic patients who were transplanted because of end-stage renal failure due to nephrosclerosis and age-matched to type II diabetic patients. We assessed the one- and three-year patient and graft survival, the quality of renal function, the main complications and causes of mortality.
  
  
  RESULTS
  The overall one- and three-year patient survival was 69% and 60% in Type II patients; 73% and 69% in Type I diabetes patients and 88% and 80% in patients with nephrosclerosis. The overall one- and three-year actuarial graft survival was 50% and 38% in patients with Type II disease and 58% and 50% in Type I diabetes, and 76% and 64% in nephrosclerosis. The main cause of graft loss in all groups was death (with functioning kidney) due to infections and cardiovascular complications.
  
  
  CONCLUSIONS
  Diabetes itself is the most important variable in patients who have poor results after kidney transplantation. Increasing age increases slightly the risk for poor graft and patient survival. Both groups of diabetic patients have poorer results than controls but in this comparison age was an independent factor.
authors.affiliation: Nephrology Service, Hospital Universitario Marqués de Valdecilla, Santander, Spain. gfernandezf@senefro.org
authors.forename: Gema
authors.initials: G
authors.lastname: Fernández-Fresnedo
authors.forename: Jose Antonio
authors.initials: JA
authors.lastname: Zubimendi
authors.forename: Julio G
authors.initials: JG
authors.lastname: Cotorruelo
authors.forename: Angel Luis M
authors.initials: AL
authors.lastname: de Francisco
authors.forename: Juan Carlos
authors.initials: JC
authors.lastname: Ruiz
authors.forename: Emilio
authors.initials: E
authors.lastname: Rodrigo
authors.forename: Milagros
authors.initials: M
authors.lastname: Heras
authors.forename: Celestino
authors.initials: C
authors.lastname: Piñera
authors.forename: Manuel
authors.initials: M
authors.lastname: Arias
mesh_terms: D000328:Adult; D000367:Age Factors; D000368:Aged; D000704:Analysis of Variance; D016022:Case-Control Studies; D016009:Chi-Square Distribution; D003922:Diabetes Mellitus, Type 1 / Q000150:complications / Q000175:diagnosis; D003924:Diabetes Mellitus, Type 2 / Q000150:complications / Q000175:diagnosis; D003928:Diabetic Nephropathies / Q000209:etiology / Q000401:mortality* / Q000473:pathology / Q000601:surgery*; D005260:Female; D006084:Graft Rejection; D006085:Graft Survival; D006801:Humans; D016030:Kidney Transplantation / Q000379:methods* / Q000401:mortality; D008297:Male; D008875:Middle Aged; D012189:Retrospective Studies; D012307:Risk Factors; D012720:Severity of Illness Index; D018709:Statistics, Nonparametric; D016019:Survival Analysis; D016896:Treatment Outcome