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Epidemiology - Public Health An approach to estimating the effects due to the single exposure factor...

Epidemiology - Public Health

An approach to estimating the effects due to the single exposure factor is to compute the: A. risk difference B. etiological fraction C. population etiologic fraction D. population risk difference

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Answer #2

Ans) B. Etiological fraction

Explaination: An approach to estimating the effects due to the single exposure factor is to compute the Etiological fraction.

- Etiologic fraction is the proportion of cases in the exposed population in which the exposure has played a causal role in disease development.

- Etiologic fraction is the probability of causation

(A1 + A2)/A+

- Etiologic fractions cannot be estimated directly from studies because the etiologic fraction requires strong biologic assumptions and are very sensitive to them.

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