Hi Harry.
I have some scripts to compute a slope into the time thickness or volume
(linear fits) and then run a standard glm on that .
However, we recommend to run a linear mixed effects model (external software).
We are working on making that available.
Best Martin
Harry Hallock <hhal5...@uni.sydney.edu.au> wrote:
>Thanks Doug!
>
>If i wanted to add a third time-point, what would u suggest would be a
>good method to use for time x group interaction?
>
>Harry
>________________________________________
>From: freesurfer-boun...@nmr.mgh.harvard.edu
>[freesurfer-boun...@nmr.mgh.harvard.edu] on behalf of Douglas N Greve
>[gr...@nmr.mgh.harvard.edu]
>Sent: Wednesday, 10 October 2012 1:10 AM
>To: freesurfer@nmr.mgh.harvard.edu
>Subject: Re: [Freesurfer] 3 Factor glm group analysis
>
>Hi Harry, I would do a time1-time2 subtraction (fscalc) and then do a 2
>group analysis (search for "paired" on our wiki).
>doug
>
>
>
>On 10/09/2012 12:45 AM, hhal5...@uni.sydney.edu.au wrote:
>> Hello,
>>
>> We are currently doing a longitudinal Group Analysis using
>FreeSurfer,
>> and were wondering if there is a way to run a 3 factor design (time
>is
>> 2 levels, group is 2 levels, subject is 10 levels) using the
>> mri_glmfit model, as i want to test the time by group interaction? Is
>> there a way of writing this model in an FSDG file? If we can't do
>this
>> using mri_glmfit, is it possible to do this using QDEC?
>>
>> Regards,
>> Harry
>>
>>
>>
>>
>> _______________________________________________
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>
>--
>Douglas N. Greve, Ph.D.
>MGH-NMR Center
>gr...@nmr.mgh.harvard.edu
>Phone Number: 617-724-2358
>Fax: 617-726-7422
>
>Bugs: surfer.nmr.mgh.harvard.edu/fswiki/BugReporting
>FileDrop: www.nmr.mgh.harvard.edu/facility/filedrop/index.html
>
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--
Sent from my phone, please excuse brevity.
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