Epidemiology & Prevention USMLE Step 1 Practice Question
A 58-year-old male smoker presents with chronic productive cough and dyspnea. Vital signs show BP 138/82, HR 92, RR 18, temperature 37.2°C, SpO2 92% on room air. Chest X-ray reveals hyperinflation without acute infiltrates. FEV1/FVC ratio is 0.68. A longitudinal study reports annual chronic bronchitis incidence of 90 per 10,000 among smokers versus 30 per 10,000 among nonsmokers. Which parameter best represents the disease burden attributable specifically to smoking exposure?
Answer choices
- A30 per 10,000
- B60 per 10,000Correct answer
- C120 per 10,000
- D90 per 10,000
- E20 per 10,000
- F75 per 10,000
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