The following equation is used to calculate the relative risk between a group exposed to a particular disease and a control group.

## Relative Risk Definition

Relative risk is a ratio that represents the relative amount of risk of a group of people contracting a given disease based on the number of people with and without the disease in both groups.

## How to calculate relative risk?

The following is a step by step example problem of using the formula above to calculate a relative risk.

- Step 1 is to determine the number of people with the disease in the exposed group.
- Next, determine the number of people without the disease in the exposed group.
- Next, determine the number of people with and without the disease in the control group.
- Finally, calculate the relative risk ratio using the formula and information from steps 1-3.

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