Enter the incidence risk among both the exposed and non-exposed groups into the calculator to determine the attributable risk.

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## Attributable Risk Formula

The following formula can be used to calculate the attributable risk.

AR = I_e - I_u

- Where AR is the attributable risk
- I
_{e}is the incidence rate in the exposed group - I
_{u}is the incidence rate in the non-exposed group

To calculate the attributable risk, subtract the incidence rate in the non-exposed group from the rate in the exposed group.

## Attributable Risk Definition

Attributable risk is the difference between the incidence rate in an exposed group to a non-exposed group.

## Attributable Risk Example

How to calculate attributable risk?

**First, determine the incidence rate in the exposed group.**Measure the incidence rate in the exposed group.

**Next, determine the incidence rate in the non-exposed group.**Measure the incidence rate in the non-exposed group.

**Finally, calculate the attributable risk.**Using the formula above, calculate the attributable risk.

## FAQ

**What is an attributable risk?**

The definition of the attributable risk is as follows: a measure of the prevalence of a disease within a group.