Why might USPSTF revise recommendations?

• A. Because they randomly change guidelines
• B. Because of new evidence about harms from false positives
• C. To align with other committees only
• D. To increase the cost of screening

Answer: (B)

Recommendations are updated when new evidence changes the balance of benefits and harms of screening. If new studies reveal additional harms from screening—such as false-positive results leading to unnecessary follow-up tests, procedures, anxiety, or complications—the overall value of a screening strategy may shift. This can lead the USPSTF to revise who should be screened, how often, or with which tests.

That’s why the option about new evidence regarding harms from false positives is the best answer. The other ideas imply random changes, alignment with other committees, or cost alone driving updates, none of which accurately describe why USPSTF revises recommendations. Changes are evidence-based and aimed at maximizing net benefit for patients.