Etiologic Fraction

Some articles on fraction, etiologic fraction:

Attributable Risk - Diversity of Interpretation
... Greenland and Robins distinguished between excess fraction and etiologic fraction in 1988 ... Etiologic fraction is the proportion of the cases that the exposure had played a causal role in its development ... It is defined as where EF = Etiologic fraction Ne = Number of exposed individuals in a population that develop the disease Nn = Number of unexposed ...

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