Bland-Altman method comparison tutorial
Learn how to assess the agreement between two methods of measurement.
In a 1986 issue of The Lancet, Bland & Altman published a paper that changed how method comparison studies are performed. In 1999, they published a follow-up paper that extended their earlier work to many different scenarios.
If you prefer you can watch a video of this tutorial.
In this tutorial you will perform the following tasks:
- Plotting the relationship between methods
- Estimating the average bias and the limits of agreement
- Understanding the importance of repeatability
- Using repeated measurements
- Dealing with a relationship between difference and magnitude of measurement
- Transforming the measurements to remove a relationship between differences and magnitude
- Estimating regression based limits of agreement when transformation is not enough
- Estimating nonparametric limits of agreement in non-normally distributed data
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