title: Open versus endovascular repair of abdominal aortic aneurysm: a survey of Canadian vascular surgeons.
abstract: OBJECTIVE
  The aim of this survey was to determine Canadian vascular surgeons' experience with elective endovascular aortic repair (EVAR) and traditional open repair and their interest in participating in an expertise- based randomized controlled trial (RCT) as opposed to a conventional RCT comparing these 2 procedures.
  
  
  METHODS
  A single-page questionnaire was developed and sent by fax, email or post to all vascular surgeons in Canada. Nonresponders were recontacted on 2 additional occasions to improve the response rate. The questionnaire had 2 sections. The first inquired about current and past practice patterns, including experience in both open and endovascular techniques. The second investigated the surgeons' belief in the value of open as opposed to endovascular repair and the value of expertise-based RCT methodology; it also canvassed their interest in participating in a future trial. Definitions of expertise in open and endovascular repair were drawn from the published literature. Criteria to determine the feasibility of conducting an expertise-based RCT were established a priori.
  
  
  RESULTS
  The questionnaire was sent to 259 surgeons who appeared in multiple vascular surgery databases, and the overall response rate was 56% (95% confidence interval [CI] 50%-62%). The mean career experience was 406 cases (standard deviation [SD] 359) for conventional open abdominal aortic aneurysm (AAA) repair and 24 cases (SD 48) for endovascular repair. Of the responding surgeons, 51% (95% CI 41%-60%) ranked conventional open repair as "probably superior." Respondents were equally interested in participating in an RCT using either expertise-based methodology (54%, 95% CI 44%-63%) or conventional design (51%, 95% CI 41%-60%).
  
  
  CONCLUSIONS
  Uncertainty exists among vascular surgeons in Canada as to the role of endovascular surgery in the repair of AAA. A national RCT comparing open with endovascular repair in the elective setting is potentially feasible with either expertise-based or conventional design. Increases in the number of surgeons who are willing to participate and have expertise in EVAR, in addition to high recruitment rates among eligible patients, will be necessary to make such a trial feasible in Canada.
authors: Department of Surgery, McMaster University, Hamilton, Ontario, Canada.
authors: Tara M
authors: TM
authors: Mastracci
authors: Catherine M
authors: CM
authors: Clase
authors: Philip J
authors: PJ
authors: Devereaux
authors: Claudio S
authors: CS
authors: Cinà
mesh_terms: D017130:Angioplasty / Q000706:statistics & numerical data*; D001014:Aortic Aneurysm / Q000601:surgery*; D001291:Attitude of Health Personnel; D019917:Blood Vessel Prosthesis Implantation / Q000706:statistics & numerical data*; D002170:Canada; D002983:Clinical Competence / Q000706:statistics & numerical data; D003625:Data Collection; D005240:Feasibility Studies; D006801:Humans; D010818:Practice Patterns, Physicians' / Q000706:statistics & numerical data*; D016032:Randomized Controlled Trials as Topic