Dear FSL experts,
I am trying to add a covariate in my TBSS analysis. I wanted to eliminate the confound of age covariate variable in my analysis (10 control, 10 patients). kindly, is the following correct:
CONTRAST (design.con)
/NumWaves 2
/NumContrasts 2
/PPheights 1 1
/Matrix
1 -1
-1 1
MATRIX 1 (design.mat)
/NumWaves 2
/NumPoints 22
/PPheights 1 1
/Matrix
1 0
1 0
1 0
1 0
1 0
1 0
1 0
1 0
1 0
1 0
0 1
0 1
0 1
0 1
0 1
0 1
0 1
0 1
0 1
0 1
MATRIX 2 (design2.mat)
/NumWaves 1
/NumPoints 22
/PPheights 1 1
/Matrix
39
48
38
50
43
27
34
30
41
41
23
39
42
44
31
42
33
31
52
37
Then I used the following command line (adding the -x and the -D options)
randomise -i all_FA_skeletonised -o tbss -m mean_FA_skeleton_mask -d design.mat -t design.con -x design2.mat -n 500 --T2 -V -D
Thank you very much
Mohamad
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