for the Open Versus Endovascular Repair (OVER) Veterans Affairs Cooperative Study Group E ACH YEAR IN THE UNITED STATES, 45 000 patients with unruptured abdominal aortic aneurysm (AAA) undergo elective repair, resulting in more than 1400 perioperative deaths. 1 Endovascular repair was developed to provide a less invasive method than the standard open procedure and has been reported to reduce perioperative mortality, hospital stay, and intensive care unit (ICU) stay. However, more frequent reinterventions have also been reported and the early survival advantage was lost within 2 years in previous randomized trials conducted in Europe, 2-4 leaving the preferred approach for AAA repair in doubt. Furthermore, the relative effects of the 2 procedures on quality of life and erectile function remain unclear. Devices and techniques continue to improve and operative mortalities and morbidities were relatively high in the European trials, raising the question of how relevant their results are to current US practice. We report shortterm perioperative outcomes after elective endovascular and open repair of AAA from a US multicenter randomized trial. METHODS Study Oversight The study was approved by a central human rights committee and the institutional review boards at each participating center. An independent data monitoring committee reviewed the data at regular intervals. Patients Eligible patients had AAA for which repair was planned and had (1) a maxi-Author Affiliations and Open Versus Endovascular Repair (OVER) Veterans Affairs Cooperative Study Group are listed at the end of this article.