[R] Bland-Altman method to measure agreement with repeated measures

Marc Schwartz marc_schwartz at comcast.net
Sat Jul 5 18:43:35 CEST 2008

on 07/05/2008 03:17 AM kende jan wrote:
> Dear all,
> I want to use the Bland-Altman method to measure agreement with
> repeated measures collected over period of time (seven periods).
> How can I do this with R
> Many thanks

The following links should be helpful from a design/methodology perspective:

   Comparing within-subject variances in a study to compare two methods
   of measurement

   Agreement between methods of measurement with multiple observations
   per individual

and perhaps more generally:


You will need to provide more detail on your experimental design and 
data for any R specific guidance, which could feasibly include the use 
of mixed effects models where subject is a random effect. In the latter 
case, there is a R e-mail list focused on that approach:



Marc Schwartz

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