Bland-Altman with multiple observations per individual

[Elisa97]

Hi everyone,

I have 21 subjects and 4 observations per subject.

Do you know how can I do a single Bland-Altman plot ? I don't how to calculate the mean and the limits of agreement.

Thank you.

[Quentin · Accepted solution]

Easiest way to start researching would be to go to www.lexjansen.com which is an index of SAS user group papers, and search for Bland-Altman plot.  You'll find papers like: https://support.sas.com/resources/papers/proceedings18/1815-2018.pdf  .

[Elisa97]

Thank you very much! Have a nice day!

[sbxkoenk]

Plot Layering for Bland-Altman Graph
By Sanjay Matange on Graphically Speaking January 3, 2014
https://blogs.sas.com/content/graphicallyspeaking/2014/01/03/plot-layering-for-bland-altman-graph/

BR, Koen