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.

Risk Ratio: Formula, Calculation, Examples & Benefits

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What is Risk Ratio?

The risk ratio involves comparing the risk of an outcome between two groups, i.e., the exposed group and the unexposed group. It is also known as the relative risk. It is very commonly used for statistical measurement, especially for clinical research in the medical field. It informs public health policies and helps policymakers prioritize health issues, allocate resources effectively, and implement strategies to reduce the risks or promote protective factors....

How to Calculate Risk Ratio? (Formula of Risk Ratio)

The risk ratio involves comparing the risk of an outcome between two groups: the exposed group and the unexposed group. The steps to calculate the risk ratio are as follows,...

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,...

Interpretation of Risk Ratio

The interpretation of the Risk Ratio(RR) following points:...

Benefits of Risk Ratio

1. Comparative Analysis: The risk ratio allows for a direct comparison of the risk levels by comparing the risk of the outcome between exposed and unexposed groups. This analysis is important for identifying potential risk factors or protective factors which can affect the outcome....

Limitation of Risk Ratio

1. Sensitivity to Outcome Frequency: The risk ratio is sensitive because small changes in the number of cases can lead to large fluctuations in the risk ratio. this makes the interpretation challenging, especially in small studies....

Risk Ratio vs. Odds Ratio

Basis Risk Ratio Odds Ratio Definition The risk ratio is the ratio that compares the risk of an outcome between two groups: the exposed group and the unexposed group. The odds ratio is the ratio that compares the odds of an outcome occurring in the exposed group to the odds of the outcome occurring in the unexposed group. Applicability It is used when the outcome is common or when the researcher is studying the effects of interventions on health outcomes. It is used when the outcome is rare or when studying relations in cross-sectional or retrospective studies. Outcomes It gives the outcome of the total number of trials. It gives the outcome about the number of outcomes which are not of our interest. Formula RR= Risk in the exposed group/Risk in the unexposed group OR= Odds of outcome in exposed group/Odds of outcome in unexposed group...

Risk Ratio – FAQs

What does a risk ratio of 1 mean?...