Which population does USPSTF recommend for a one-time abdominal aortic aneurysm screening using ultrasonography?

• A. Screen men aged 65 to 75 years who have ever smoked, one time, with ultrasonography
• B. Screen men aged 50 to 70 who have ever smoked, annually with ultrasonography
• C. Screen women aged 65 to 75 who have ever smoked, one time, with ultrasonography
• D. Screen men aged 70 to 90 who have never smoked, one time, with ultrasonography

Answer: (A)

The main idea is identifying who benefits most from a one-time ultrasound screen for abdominal aortic aneurysm based on population risk and proven mortality benefit. The best answer matches USPSTF guidance: a one-time abdominal aortic aneurysm screening with ultrasonography for men aged 65 to 75 who have ever smoked. This group has the highest prevalence of AAA, and evidence shows that a single ultrasound screen reduces AAA-related deaths by detecting aneurysms before rupture. The screening is not routinely recommended for women in this age range (insufficient evidence for benefit), nor for men who have never smoked, and the guidelines do not endorse an annual screen or different age ranges outside 65–75 for this purpose.