Dear FS-Experts,
I would like to compare 2 Groups (Responder (N=19) vs. Non-Responder (N=11)) with longitudinal data. Participants from both groups had only 2 scan sessions in each case 10 weeks apart.
So far is used the glmfit-variant with --paired-diff option in the first place. (based on http://surfer.nmr.mgh.harvard.edu/fswiki/PairedAnalysis)
The paired-fsgd contained then 2 classes (Responder, Non-Responder) which is used in glm-fit for comparison with the contrast (1 -1) for group diffs.
This approach confirmed our hypothesized effects but I'm not sure whether I used the right strategy.
Could you might help me with this issue?
Thank in advance
Best,
Vivian
Yes, that looks correct, though I could be more confident if you send the command lines used and your fsgd file(s). doug
On 10/31/2013 07:32 AM, Vivian R. Steiger wrote:
Dear FS-Experts,
I would like to compare 2 Groups (Responder (N=19) vs. Non-Responder (N=11)) with longitudinal data. Participants from both groups had only 2 scan sessions in each case 10 weeks apart.
So far is used the glmfit-variant with --paired-diff option in the first place. (based on http://surfer.nmr.mgh.harvard.edu/fswiki/PairedAnalysis)
The paired-fsgd contained then 2 classes (Responder, Non-Responder) which is used in glm-fit for comparison with the contrast (1 -1) for group diffs.
This approach confirmed our hypothesized effects but I'm not sure whether I used the right strategy.
Could you might help me with this issue?
Thank in advance
Best,
Vivian
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Douglas N Greve -
Vivian R. Steiger