Of the 4734 study participants, 416 (8.8%) had an abdominal aortic aneurysm. More than 87% of these aneurysms were smaller than 3.5 cm across. Men, smokers, and people who were older or had known cardiovascular disease were most likely to have aneurysms. Twenty-three people (all of whom had aneurysms larger than 5 cm) required surgery for aneurysm repair, and six people died of burst aneurysms. Even after accounting for cardiovascular risk factors, such as smoking and abnormal cholesterol levels, persons with aneurysms were 40% more likely than those without aneurysms to develop cardiovascular events or die.