Attributable Risk Calculator

Formula

The formula to calculate Attributable Risk (AR) is:

\[ AR = I_e - I_u \]

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 (%)

What is Attributable Risk?

Attributable risk is the difference between the incidence rate in an exposed group compared to a non-exposed group. It is used in epidemiology to quantify the impact of a risk factor on a population.

Example Calculation

Let's consider an example:

Incidence Rate in the Exposed Group (I_e): 10%
Incidence Rate in the Non-Exposed Group (I_u): 3%

Using the formula to calculate Attributable Risk:

\[ AR = 10\% - 3\% = 7\% \]

This shows that with an incidence rate of 10% in the exposed group and 3% in the non-exposed group, the attributable risk is 7%.