Youden Index
- Created by
- Renato Passos, Eng. de Software
- Reviewed by
- Renato Passos, Eng. de Software
Last updated: Apr 18, 2026
About this calculator
The Youden Index calculator is a valuable tool for statisticians and researchers looking to evaluate the efficacy of diagnostic or predictive tests.
It calculates the Youden Index, a performance metric that combines sensitivity and specificity into a single measure, allowing for a clearer understanding of a test's capabilities.
The Youden Index calculation involves adding the sensitivity and specificity of the test, then subtracting 1. This provides a more robust measure of the test's performance, enabling a more precise comparison with other methods.
Here, you can input the sensitivity and specificity values of your test and receive the calculated Youden Index instantly.
Frequently asked questions
What is the Youden Index?
The Youden Index is a performance metric that combines sensitivity and specificity into a single measure. It is calculated by adding the sensitivity and specificity, then subtracting 1.
When to use the Youden Index calculator?
Use the Youden Index calculator when you need to evaluate the efficacy of a diagnostic or predictive test, or when you need to compare the performance of different methods.
How to interpret the calculator's result?
The result of the calculator is the calculated Youden Index, which can range from 0 to 1. The higher the value, the better the test's efficacy.
Can I use the Youden Index calculator with any type of test?
Yes, the Youden Index calculator can be used with any type of diagnostic or predictive test, as long as you have the sensitivity and specificity values.