24 Sep
2009
24 Sep
'09
3:02 p.m.
Hi,
I would like to study cortical thickness in a cohort of patient with respect to MMSE and CDR. I prepared a fsgd file where I have both MMSE and CDR listed:
GroupDescriptorFile 1 Title Mytitle Class Male Class Female Variable Age Variable MMSE Variable CDR Class Ctrl Class MCI Input subject1 Male 70 27 0.5 MCI Input subject2 Female 65 28 0 Ctrl
My design matrix should thus have 4*(3+1)=16 columns/regressors.
I am puzzeled a bit, how would I set the contrast matrix to study only correlation of thickness with MMSE, while ignoring CDR. Or should I have a separate fsgd file?
Thanks,
Martin