title: Probability of deceased donor kidney transplantation based on % PRA.
abstract: Sensitization to HLA antigens creates an obstacle for the accessibility and success of kidney transplantation (KT). Highly sensitized patients have longer waiting times and some may never receive a KT.
  
  
  OBJECTIVE
  To determine the probability of patients on the deceased donor (DD) waiting list to receive a KT based on the panel reactive antibody percentage (% PRA) in our center.
  
  
  METHODS
  The DD waiting list from our institution was analyzed from 01/05 to 08/12 documenting the clinical variables from donor and potential recipients (ABO blood group), lymphocyte cross-match [CxM (CDC-AHG)] results, highest % PRA determination, and time on the waiting list. The patients were classified into 4 groups based on the % PRA: 0%, 1-19%, 20-79% and 80-100%. The data was analyzed using odds ratio and logistic regression (significant p<0.05).
  
  
  RESULTS
  58 DD (F:M 34:24, ABO group O=35, A=13, B=10) and 179 potential recipients were analyzed (F:M 98:81, ABO group O=127, A=33, B=19, participating 4.2 ± 3.8 times with different donors to receive KT). The mean PRA for the whole group was 22 ± 32%, median [md] 0 (0-98). A total of 100 patients received KT (mean waiting time 2.2 ± 1.7 years, 12 days-7 years) and their mean % PRA was 11.6 ± 24, md 0 (0-94) vs. 31.4 ± 37 md 8.5 (0-98) in those who have not received a KT. An association between the % PRA group and KT (p<0.003) was observed. The probability of receiving KT with a 0% PRA vs. >0% was higher (OR 2.12, 1.17-3.84). There was no difference between the 0% vs. 1-19% group (OR 1); differences were observed between 0% vs. 20-79% (OR 2.5, 1.18-5.3) and 0% vs. 80-100% (OR 5, 1.67-14.9). For every percent increase in the PRA above 20%, the risk of not receiving a KT increased by 5% (1-9, p<0.01).
  
  
  CONCLUSIONS
  The probability of receiving a DD kidney transplant is inversely related to the % PRA although a higher risk for not receiving a KT becomes evident with a PRA >20%.
authors.affiliation: Department of Transplantation, National Institute of Medical Sciences and Nutrition, Mexico City, Mexico.
authors.forename: I C
authors.initials: IC
authors.lastname: Bostock
authors.forename: J
authors.initials: J
authors.lastname: Alberú
authors.forename: A
authors.initials: A
authors.lastname: Arvizu
authors.forename: E A
authors.initials: EA
authors.lastname: Hernández-Mendez
authors.forename: A
authors.initials: A
authors.lastname: De-Santiago
authors.forename: N
authors.initials: N
authors.lastname: González-Tableros
authors.forename: M
authors.initials: M
authors.lastname: López
authors.forename: N
authors.initials: N
authors.lastname: Castelán
authors.forename: A G
authors.initials: AG
authors.lastname: Contreras
authors.forename: L E
authors.initials: LE
authors.lastname: Morales-Buenrostro
authors.forename: B
authors.initials: B
authors.lastname: Gabilondo
authors.forename: M
authors.initials: M
authors.lastname: Vilatobá
mesh_terms: D000328:Adult; D002102:Cadaver; D005260:Female; D006084:Graft Rejection / Q000453:epidemiology* / Q000276:immunology; D006085:Graft Survival / Q000276:immunology; D006650:Histocompatibility Testing; D006801:Humans; D016030:Kidney Transplantation / Q000706:statistics & numerical data*; D008297:Male; D011336:Probability; D014019:Tissue Donors / Q000706:statistics & numerical data*; D014850:Waiting Lists
keywords: Deceased donor kidney transplantation; Highly sensitized; Kidney transplant recipient; Panel reactive antibody; Sensitization