Hello Freesurfers,
My apologies for this very basic question more about statistics than
freesurfer, but I have not found an answer anywhere on the wikis, or the web
(maybe it is too basic :-) ) I am interested in age-related effects of hiv and
I wanted to covary for age and education in mri_glmfit. For example, if my
fsgd file is:
class control
class hiv
variables age ed
input subj1 control 40 13
input subj2 hiv 35 12
...
...
and I use dods, is my contrast matrix the place where I would tell it to
covary? Something like:
0 0 -1 1 1 1 1 1
(y-int) (age slope) (covary for age) (covary for ed)
As always, thank you for your help,
Jeff
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