Levin's formula (Rothman, Greenland and Lash 2008, chapter 5):
$$PAF = p (RR - 1) / (1 + p (RR - 1)).$$
Usage
morie_envhealth_attributable_fraction(rr, exposure_prevalence)
Arguments
- rr
Relative risk at the observed exposure level.
- exposure_prevalence
Proportion of the population exposed, in
[0, 1].
Value
The fraction of cases that would be avoided if the exposure were
removed.
Examples
morie_envhealth_attributable_fraction(1.5, 0.4)
#> [1] 0.1666667
