Defining Perioperative Mortality after Open and Endovascular Aortic Aneurysm Repair in the US Medicare Population

Perioperative mortality is reported after abdominal aortic aneurysm (AAA) repair, but there is no agreed upon standard definition. Often, 30-day mortality is reported because in-hospital mortality may be biased in favor of endovascular repair given the shorter length of stay. However, the duration of increased risk of death after aneurysm repair is unknown.We used propensity score modeling to create matched cohorts of US Medicare beneficiaries...