Table I.

ICD9 Diagnostic and procedural codes for population selection

Code	Description
Diagnostic
441.3	Aortic abdominal aneurysm, ruptured
Procedural
39.71	Endovascular implantation of graft in abdominal aorta
38.44	Resection of abdominal aorta with replacement
39.25	Aorta-iliac-femoral bypass
39.52	Other repair of aneurysm
38.34	Resection of abdominal aorta with anastomosis
38.64	Other excision of abdominal aorta
38.40	Resection of vessel with replacement, unspecified site
38.60	Other excision of vessels, unspecified site