Example of Risk Ratio
Let us take an example of a study to investigate the risk of developing type 2 diabetes among individuals with and without obesity,
- Exposed Group (Obese Individuals): There are 500 individuals with obesity.
- Unexposed Group (Non-obese Individuals): There are 1000 individuals without obesity.
During the follow-up period:
- In the exposed group (obese individuals), 100 individuals developed type 2 diabetes.
- In the unexposed group (non-obese individuals), 50 individuals developed type 2 diabetes.
1. Risk in the Exposed Group =
2. Risk in the Unexposed Group =
3. Risk Ratio =
Since the risk ratio is 4, it indicates that individuals with obesity are 4 times more likely to develop type 2 diabetes compared to those without obesity. In other words, there is an increased risk of developing type 2 diabetes associated with obesity.