GLM - Freesurfer

1 Nov 2018


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Hi experts,
I am using FS 6.0 for analyzing the cortical thickness difference between 3 groups: patient1, patient2 and control. In DODS model, I need to creat 2 files, FSDG and mtx file.  And we have 3 variables: age, gender and cortical thickness. 
1. The FSDG file is:
GroupDescriptorFile 1
Title Tutorial
Class patient1-male
Class patient1-female
Class patient2-male
Class patient2-female
Class control-male
Class control-female
Variables                                 age
Input subject1 patient1-female 20
Input subject2 patient1-male    33
Input subject3 patient2-female 40
Input subject4 patient2-male    50
Input subject5 control-male    30
Input subject6 control-female 35
And there is another way:
GroupDescriptorFile 1
Title Tutorial
Class patient1
Class patient2
Class control
Variables                     sex age
Input subject1 patient1 1   20
Input subject2 patient1 2   33
Input subject3 patient2 1   40
Input subject4 patient2 2   50
Input subject5 control   2   30
Input subject6 control   1   35
What I want to confirm is that if I want to adjust for sex and age, which one is right?
Another question is that is there any way to get the multiple comparisons between groups simultaneously?
I am looking forward to your reply. Thanks very much.
Sincerely,
Zheng