A 58-year-old male smoker with a 40-pack-year history presents with productive cough and dyspnea. Vital signs show BP 145/88, HR 98, RR 22, SpO2 88% on room air. A longitudinal study evaluates chronic bronchitis incidence: 90 per 10,000 among smokers versus 30 per 10,000 among nonsmokers. Spirometry shows reduced FEV1/FVC ratio. He denies orthopnea. Which calculation represents the attributable risk of smoking for chronic bronchitis development?

  1. A)60 per 10,000GABARITO
  2. B)30 per 10,000
  3. C)20 per 10,000
  4. D)120 per 10,000
  5. E)90 per 10,000

Explicação

Attributable risk is the incidence in the exposed group minus the incidence in the unexposed group. Here that is 90 minus 30, or 60 per 10,000. It represents the excess disease burden in smokers that is attributable to the exposure. Ver explicação completa e trilha adaptativa →

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