Re: [Freesurfer] question about longitudinal data analyses

2021-07-15 Thread Douglas N. Greve
For A-TP1-vs-B-TP1, you just create a contrast (not a variable in the FSGD). The design matrix from your FSGD will have 6+4=10 regressors. The contrast for A-TP1-vs-B-TP1 would then be 1 -1 0 0 0 0 0 0 0 0 This computes the difference between Class A-TP1 and B-TP1 On 7/13/2021 11:07 AM, Ritobr

Re: [Freesurfer] question about longitudinal data analyses

2021-07-13 Thread Ritobrato Datta
External Email - Use Caution Good morning Doug, I am trying to create a contrast matrix (also attached as a text file) for the following conditions - I have two treatment arms A and B For treatment arm A, I have subjects 1, 2, 3 imaged at TP1, TP2, TP3 For treatment arm B, I have

Re: [Freesurfer] question about longitudinal data analyses

2021-07-12 Thread Douglas N. Greve
Yes, it will work on both. If you use a table, then pass the table with --table tablefile instead of --y On 7/12/2021 7:54 AM, Ritobrato Datta wrote: External Email - Use Caution Good morning, Thanks Doug for the answers. Quick naive question. The analyses I want to perform are on v

Re: [Freesurfer] question about longitudinal data analyses

2021-07-12 Thread Ritobrato Datta
External Email - Use Caution Good morning, Thanks Doug for the answers. Quick naive question. The analyses I want to perform are on volumetric data parcellated using aseg and not surface data. Does mri_glmfit work with the output of the asegstats2table or on voxelwise FA maps ?

Re: [Freesurfer] question about longitudinal data analyses

2021-07-09 Thread Douglas N. Greve
On 7/9/2021 11:44 AM, Ritobrato Datta wrote: External Email - Use Caution Hi All, I have the following data – I have 205 subjects - each subject was imaged at 3 timepoints (baseline, followup 1 and followup 2) The 205 subjects are split in two treatment arms with 100 subjects in

[Freesurfer] question about longitudinal data analyses

2021-07-09 Thread Ritobrato Datta
External Email - Use Caution Hi All, I have the following data – I have 205 subjects - each subject was imaged at 3 timepoints (baseline, followup 1 and followup 2) The 205 subjects are split in two treatment arms with 100 subjects in the first one and 105 subjects in the sec