We are receiving a lot of questions about relevant analyses in the Analyse-it Method Validation edition to help in evaluating new diagnostic tests in the fight against COVID-19. Below are some quick links that will help, but contact us if you have questions - we are working as normal.
Also see our latest blog post: Sensitivity/Specificity and The Importance of Predictive Values for a COVID-19 test
Test the commutability of reference materials or processed samples with unprocessed samples.
You must fit a Deming regression to perform this task.
The scatter plot shows the points in different colors depending on the type of sample. The fit is restricted to a unprocessed samples and the prediction band includes any additional samples that are commutable with the unprocessed samples. A table lists the additional samples and if they are commutable with the unprocessed samples.