Enter the incidence in the exposed group and the incidence in the non-exposed group into the calculator to determine the attributable risk percent. This calculator helps to understand the proportion of risk in the exposed group that can be attributed to the exposure.
Attributable Risk Percent Formula
The following formula is used to calculate the attributable risk percent.
ARP = ((IE - INE) / IE) * 100
Variables:
- ARP is the attributable risk percent (%)
- IE is the incidence in the exposed group
- INE is the incidence in the non-exposed group
To calculate the attributable risk percent, subtract the incidence in the non-exposed group from the incidence in the exposed group, divide by the incidence in the exposed group, and then multiply by 100 to get the percentage.
What is Attributable Risk Percent?
Attributable risk percent (ARP) is a measure used in epidemiology to quantify the proportion of disease or health outcome in the exposed group that can be attributed to the exposure. It is a useful statistic for understanding the public health impact of eliminating a risk factor among a population. ARP is expressed as a percentage, indicating how much of the incidence in the exposed group is due to the exposure compared to the non-exposed group.
How to Calculate Attributable Risk Percent?
The following steps outline how to calculate the Attributable Risk Percent.
- First, determine the incidence in the exposed group (IE).
- Next, determine the incidence in the non-exposed group (INE).
- Next, gather the formula from above = ARP = ((IE – INE) / IE) * 100.
- Finally, calculate the Attributable Risk Percent (ARP).
- After inserting the variables and calculating the result, check your answer with the calculator above.
Example Problem :
Use the following variables as an example problem to test your knowledge.
Incidence in the exposed group (IE) = 0.10 (or 10%)
Incidence in the non-exposed group (INE) = 0.02 (or 2%)
