Attributable Risk Percent (AR%) AR expressed as a percentage of risk in exposed • Provides answers to What is the proportion of disease among the exposed which … – • can be attributed to the exposure?

could be avoided by eliminating the exposure? Synonyms Attributable proportion – Etiologic fraction (EF) – •

Attributable Risk Percent

Incidence % Exposed I exposed I unexposed I exposed

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RR 1 x 100 RR Unexposed

Population Attributable Risk Percent (PAR%) PAR expressed as a precentage of total risk in population •

PAR%

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I population I unexposed x 100 I population