Your coding for gender is probably wrong. The way you have it set up, you are saying that gender#2 should have twice the thickness of gender #1. You should set up 4 classes (PM, PF, CM, CF)
On 04/23/2014 03:40 PM, Baker, Justin T.,M.D.,Ph.D. wrote:
Hi all,
I'm trying to run what should be a very simple cortical thickness regression analysis in mri_glmfit, but could use some help with putting together my "C.txt" and FSGD files. I have two classes (e.g. Patient, Control) and two nuisance variables (i.e. Age, Gender).
My FSGD file looks like this: GroupDescriptorFile 1 Title FS_Thickness Class Patient Class Control Variables Age Gender Input 130725_GB49NP Patient 18 1 Input 130620_HU64KP Patient 21 2 ...
And my "C.txt" file looks like: 1 -1 0 0 0 0 ...which I'm pretty sure is wrong, but I don't quite understand what the columns mean, so any light shed would be appreciated!
-Justin
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