How effective is ultrasound screening for abdominal aortic aneurysm (AAA)?
The incidence of AAA in women is lower than for men. All-case mortality was not significantly different betweenscreened and unscreened groups three to five years after screening, which is to be expected given the relative infrequency of AAA as a cause of death. The “high NNS” is similar to other screening procedures.
AAA is found in 5-10% of men aged 65 to 79 years. The major complication is rupture, which has a mortality of 80% for patients reaching hospital, and 50% for those undergoing surgery for emergency repair. Currently elective surgical repair is recommended for aneurysms discovered to be larger than 5.5 cm to prevent rupture.