Risk of 30-day postdischarge mortality associated with different lengths of hospital stay (early, usual, and late discharge) among patients discharged home following thoracic endovascular aneurysm repair (TEVAR) and open thoracic aortic aneurysm (TAA) repair. For TEVAR, early discharge length of stay (LOS) was defined as 1 to 2 days, normal discharge LOS was 3 to 7 days, and late discharge LOS was >8 days. For open TAA repair, early discharge LOS was defined as a 3 to 6 days, normal discharge LOS was 7 to 10 days, and late discharge was >11 days.