Attributable Risk Percent (AR%)

Report
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 –
Attributable Risk Percent
Incidence
%
Exposed
Iexposed - Iunexposed RR - 1

x 100
RR
Iexposed
Unexposed
Population Attributable Risk
Percent (PAR%)
PAR expressed as a precentage of total •
risk in population
Ipopulation - Iunexposed
PAR% 
x 100
Ipopulation

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