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
http://www-users.york.ac.uk/~mb55/meas/compsd.htm
Agreement between methods of measurement with multiple observations
per individual
http://www-users.york.ac.uk/~mb55/meas/ba2007.htm
and perhaps more generally:
http://www-users.york.ac.uk/~mb55/meas/comfaq.htm
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:
https://stat.ethz.ch/mailman/listinfo/r-sig-mixed-models
HTH,
Marc Schwartz
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