title: Prediction of 30-day mortality after endovascular repair or open surgery in patients with ruptured abdominal aortic aneurysms.
abstract: OBJECTIVE
  To validate the Glasgow Aneurysm Score (GAS) in patients with ruptured abdominal aortic aneurysms (AAAs) treated with endovascular repair or open surgery and to update the GAS so that it predicts 30-day mortality for patients with ruptured AAA treated with endovascular repair or open surgery.
  
  
  METHODS
  In a multicenter prospective observational study, 233 consecutive patients with ruptured AAAs were evaluated; 32 patients did not survive to repair and statistical analysis was performed using collected data on 201 patients. All patients who were treated with endovascular repair (n = 58) or open surgery (n = 143) were included. The GAS was calculated for each patient. The area under the receiver operating characteristics curve (AUC) was used to indicate discriminative ability. We tested for interactions between risk factors and the procedure performed. The GAS was updated to predict 30-day mortality after endovascular repair or open surgery in patients with ruptured AAAs using logistic regression analysis.
  
  
  RESULTS
  Thirty-day mortality was 15/58 (26%) for patients treated with endovascular repair and 57/143 (40%) for patients treated with open surgery (P = .06). The AUC for GAS was 0.69. No relevant interactions were found. The updated prediction rule (AUC = 0.70) can be calculated with the following formula: + 7 for open surgery + age in years + 17 for shock + 7 for myocardial disease + 10 for cerebrovascular disease + 14 for renal insufficiency.
  
  
  CONCLUSIONS
  We showed limited discriminative ability of the GAS and therefore updated the GAS by adding the type of procedure performed. This updated prediction rule predicts 30-day mortality for patients with ruptured AAAs treated with endovascular repair or open surgery.
authors.affiliation: Department Epidemiology and Biostatistics, Erasmus Medical Center, Rotterdam, The Netherlands.
authors.forename: Jacob J
authors.initials: JJ
authors.lastname: Visser
authors.forename: Martine
authors.initials: M
authors.lastname: Williams
authors.forename: Jur
authors.initials: J
authors.lastname: Kievit
authors.forename: Johanna L
authors.initials: JL
authors.lastname: Bosch
mesh_terms: D000367:Age Factors; D000368:Aged; D000369:Aged, 80 and over; D017544:Aortic Aneurysm, Abdominal / Q000000981:diagnostic imaging / Q000401:mortality* / Q000601:surgery*; D001019:Aortic Rupture / Q000000981:diagnostic imaging / Q000401:mortality* / Q000601:surgery*; D019917:Blood Vessel Prosthesis Implantation / Q000401:mortality*; D001900:Boston; D002561:Cerebrovascular Disorders / Q000401:mortality; D005260:Female; D006305:Health Status Indicators; D006331:Heart Diseases / Q000401:mortality; D006801:Humans; D016015:Logistic Models; D008297:Male; D009426:Netherlands; D016017:Odds Ratio; D011237:Predictive Value of Tests; D011446:Prospective Studies; D012372:ROC Curve; D011859:Radiography; D051437:Renal Insufficiency / Q000401:mortality; D015203:Reproducibility of Results; D018570:Risk Assessment; D012307:Risk Factors; D012769:Shock / Q000401:mortality; D013997:Time Factors; D016896:Treatment Outcome; D014656:Vascular Surgical Procedures / Q000401:mortality*