title: Risk factors for immediate results and long-term survival following elective open surgery for AAA. Statistical analysis of 1111 consecutively-treated patients.
abstract: OBJECTIVE
  Perioperative and 10 years follow-up risk factors for 1111 consecutive open AAA repairs were statistically analyzed (X2-test and Log-rank test methods for univariate analysis, and logistic regression model and Cox proportional-hazard model for multivariate analysis). Overall operative mortality rate was 2.7%, and significant risk factors were: 1) univariate analysis: Age (>70 years 3.9% vs 1.5% <70 years); CAD (4.3% vs 1.9% without CAD); PAD (4.7% vs 2.0%); III-IV ASA classes (3.8% vs 0% in I-II ASA classes); 2) multivariate analysis: only ASA classes.
  
  
  RESULTS
  Long-term survival (42.3 +/- 32.6 months) was 93% and 88% at 3 and 5 years respectively, with 0.2% graft-related deaths, and significant risk factors were 1) univariate analysis: Age (92% and 84% at 3 and 5 years in patients aged >70 vs 94% and 91% <70 years); ASA classes (91% and 87% at 3 and 5 years in ASA III-IV vs 98% and 92% in ASA I-II); CAD (92% and dell'85% vs 94% and 90% without CAD); COPD (90% and 80% vs 95% and 92% without COPD); CRF (90% and 82%, vs 94% and 89% without CRF); suprarenal aortic cross-clamping for pararenal aneurysms (91% and 77% in pararenal AAA, vs 94 % and 90% in infrarenal AAA; 2) multivariate analysis: Age; ASA classes; pararenal aneurysms. There was a close relation between number (0-5) of risk factors in each patient and early and late complications. These data are very satisfactory overall, and even in high risk patients who are routinely considered for EVAR.
authors.affiliation: Department of Medical and Surgical Sciences, University of Brescia, Italy. bonardel@med.unibs.it
authors.forename: Stefano
authors.initials: S
authors.lastname: Bonardelli
authors.forename: Giovanni
authors.initials: G
authors.lastname: Parrinello
authors.forename: Maurizio
authors.initials: M
authors.lastname: De Lucia
authors.forename: Franco
authors.initials: F
authors.lastname: Nodari
authors.forename: Roberto
authors.initials: R
authors.lastname: Maffeis
authors.forename: Edoardo
authors.initials: E
authors.lastname: Cervi
authors.forename: Fabio
authors.initials: F
authors.lastname: Viotti
authors.forename: Tullio
authors.initials: T
authors.lastname: Piardi
authors.forename: Nazario
authors.initials: N
authors.lastname: Portolani
authors.forename: Stefano M
authors.initials: SM
authors.lastname: Giulini
mesh_terms: D000368:Aged; D000704:Analysis of Variance; D017544:Aortic Aneurysm, Abdominal / Q000401:mortality* / Q000601:surgery; D003324:Coronary Artery Disease / Q000150:complications; D017558:Elective Surgical Procedures / Q000401:mortality*; D005260:Female; D005500:Follow-Up Studies; D006801:Humans; D008297:Male; D016491:Peripheral Vascular Diseases / Q000150:complications; D011183:Postoperative Complications / Q000401:mortality; D016016:Proportional Hazards Models; D029424:Pulmonary Disease, Chronic Obstructive / Q000150:complications; D012307:Risk Factors