Question

What is population attributable fraction? the fraction of people at risk for an outcome in a...

What is population attributable fraction?

  1. the fraction of people at risk for an outcome in a region
  2. the proportion which the incidence rate of an outcome in the entire population would be reduced if the exposure (risk factor) were eliminated
  3. the number of new occurrences of a specific outcome attributable to an exposure
  4. the attributable fraction among the exposed, expressed as a percentage
Math   Statistics-And-Probability   
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Answer #1

Note:

i) Attributable Fraction ( AF ) : proportion by which the incidence rate of the outcome among those exposed would be reduced if the exposure were eliminate.

ii) Population Attribute Fraction: estimate proportion of disease in a population that is attributable to the exposure, and that, theoretically, would be eliminated if the exposure were removed.

Therefore,

Answer: the proportion which the incidence rate of an outcome in entire population would be reduced if the exposure ( risk factor ) were eliminated.

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