Epidemiology & Prevention USMLE Step 1 Practice Question
A 59-year-old asymptomatic woman with a 20 pack-year smoking history presents for preventive care. Vital signs are normal (BP 128/82, HR 72, RR 14, Temp 98.6°F). She denies cough or dyspnea. Recent labs show normal lipid panel and glucose. She asks which health measure best detects disease at an early, more treatable stage rather than preventing its initial occurrence. Which intervention is the best example of secondary prevention?
Answer choices
- AColonoscopy for asymptomatic colorectal cancer screeningCorrect answer
- BPhysical therapy after a stroke
- COccupational helmet use
- DSmoking cessation
- EInsulin therapy for type 1 diabetes mellitus
- FLow-dose CT screening for lung cancer in high-risk smokers
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