title: Comparison of risk-scoring systems in predicting hospital mortality after abdominal aortic aneurysm repair.
abstract: OBJECTIVE
  To compare the Physiological and Operative Severity Score for the enUmeration of Mortality and Morbidity, Portsmouth adjustment (P-POSSUM), the Hardman index and the Glasgow aneurysm score (GAS) in the prediction of hospital mortality after abdominal aortic aneurysm (AAA) repair.
  
  
  METHODS
  Medical charts of 146 AAA patients treated between January 1996 and January 2007 were reviewed. The P-POSSUM, Hardman index and GAS were calculated for each patient. The scores were tested and compared for their discriminatory ability to predict hospital death.
  
  
  RESULTS
  Of the 146 patients with ruptured and unruptured AAAs (133 underwent open repair, five underwent extra-anatomical bypass and eight underwent endovascular aneurysm repair), 18 died (12%) after AAA repair. The areas under the receiver operating characteristic curves for the GAS, Hardman index and P-POSSUM for predicting hospital mortality were 0.740, 0.730 and 0.886, respectively. The area under the receiver operating characteristic curve for the P-POSSUM was significantly higher than those of other scores.
  
  
  CONCLUSIONS
  In the present study, the P-POSSUM was the best predictor of hospital mortality for patients undergoing AAA repair.
authors.affiliation: Department of Surgery, Faculty of Medicine, Ramathibodi Hospital, Mahidol University, Bangkok, Thailand.
authors.forename: Chaiyarat
authors.initials: C
authors.lastname: Supsamutchai
authors.forename: Chumpon
authors.initials: C
authors.lastname: Wilasrusmee
authors.forename: Panuwat
authors.initials: P
authors.lastname: Lertsithichai
authors.forename: Napaphat
authors.initials: N
authors.lastname: Proprom
authors.forename: Dilip S
authors.initials: DS
authors.lastname: Kittur