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→Population attributable risk (PAR)
[[File:PAR.jpg]]
[[File:PAR.jpg]]
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===Population attributable fraction (PAF)===
The population attributable fraction is the proportion of all cases in the population that could have been prevented by removal of exposure. It is related to the AF above and is calculated by dividing the PAR by the prevalence of disease in the study population.</big><br />
[[File:PAF.jpg]]
[[File:PAF.jpg]]