Breast cancer screening age range example.

• A. Women 40-74 should be screened annually.
• B. Women 50-74 should be screened every 2 years.
• C. Women 60-80 should be screened every 5 years.
• D. Women 50-74 should be screened every 2 years.

Answer: (B)

The main idea tested is the USPSTF-recommended age range and interval for routine breast cancer screening in average-risk women. For screening with mammography, the guideline supports doing it every two years for women aged 50 through 74 who are at average risk. This biennial interval balances benefits (early cancer detection) with harms (false positives, overdiagnosis) and uses a duration that has shown the best net benefit in most analyses. Starting earlier, at 40, is not routinely advised because the absolute benefit in that younger group is smaller and a discussion about screening should be individualized. Extending screening beyond 74 is not routinely recommended since the net benefit declines and the guideline does not endorse a 5-year interval. So the option stating 50–74 years every 2 years fits the established recommendation.