get_pop_fraction: Get population attributable or impact fraction

In healthiar: Quantifying and Monetizing Health Impacts Attributable to Exposure

Get population attributable or impact fraction

Description

This function calculates the population attributable fraction or potential impact fraction of a health outcome due to exposure to an environmental stressor

Usage

get_pop_fraction(rr_at_exp_1, rr_at_exp_2, prop_pop_exp_1, prop_pop_exp_2)

Arguments

rr_at_exp_1	Numerical value showing the risk estimate of the concentration response function for a specific concentration in the scenario 1. The population attributable fraction is normally calculated using the risk estimate that refers to the concentration that reflects the population exposure and the cut-off. This risk estimate is obtained after re-scaling from the epidemiological study with a particular increment (e.g. for PM2.5 10 or 5 ug/m3) to the aimed concentration.
rr_at_exp_2	Numerical value showing the risk estimate of the concentration response function for a specific concentration in the scenario 2. The population attributable fraction is normally calculated using the risk estimate that refers to the concentration that reflects the population exposure and the cut-off. This risk estimate is obtained after re-scaling from the epidemiological study with a particular increment (e.g. for PM2.5 10 or 5 ug/m3) to the aimed concentration.
prop_pop_exp_1	Numerical value showing the fraction ([0,1]) of population exposed to the environmental stressor in the scenario 1. Per default = 1 (i.e. 100% of population is exposed).
prop_pop_exp_2	Numerical value showing the fraction ([0,1]) of population exposed to the environmental stressor in the scenario 1. Per default = 1 (i.e. 100% of population is exposed).

Details

For more information about the equations used please see the function documentation of attribute_health.

Value

This function returns a value corresponding to the population attributable fraction

Author(s)

Alberto Castro & Axel Luyten

healthiar documentation built on March 12, 2026, 5:07 p.m.