Hi Christoph,
1) I would use only intercept as random effect. I like to keep the model simple
and - as you say - there is only a max of 2 time points. If you like you can do
a model comparison (see wiki page) to compare the two models.
2) I would use the exact time in years (as float with
Dear FreeSurfer community,
I have a few questions regarding the usage of the LME matlab tools for
longitudinal data analyses, and how to set up the model. We have patients and
control data that we want to compare with respect to cortical changes over time
(two time points: baseline and
