Hi,
I had a question about the rate of change (thickening in mm/year) for the
longitudinal processing. How is this value calculated when there are more
than two timepoints per subject? Thank you!
-Shannon K.
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Freesurfer@nmr.mg
Hi,
I was wondering if there is a way to run statistical tests, such as a
2-way ANCOVA, on QDEC but without the interaction effect. I ran a 2-way
ANCOVA for thickness measures for a longitudinal study, and no interaction
effect was found. Therefore, I would like to run the same test but without
t
Hi,
Is there a way to set up a repeated measures ANOVA and ANCOVA with two
different groups (ex: study group v. controls) and each subject has more
than two timepoints? Would it be possible to assign each Input in the fsgd
file to two classes (ex: timepoint scan and group) or is there another way
Hi Freesurfers,
I've just tried to use the long_mris_slopes command on some longitudinal
data. I've created my long.qdec.table.dat file. I've run this command
before without any problems but I need to re-run it again. This time when I
try to re-run it this error pops up:
ERROR 1 : mris_label_cal
on, you can use the DOSS (different offset/same slope) instead
> of DODS
> doug
>
> On 08/20/2012 03:47 PM, Shannon Kogachi wrote:
> > Hi,
> > I was wondering if there is a way to run statistical tests, such as
> > a 2-way ANCOVA, on QDEC but without the interaction
Hi,
I had a question about how the temporal average is calculated for subjects
with multiple timepoints. I used the long_mris_slopes command on a
longitudinal set of data. However, when I compared the average volumes
calculated through this command to the average volumes calculated in excel
after
2:49 PM, Martin Reuter
wrote:
> Hi Shannon
>
> You probably mean average thickness.
> My scripts compute the temporal average from the linear fit (at mid time),
> which can be differed from simply averaging values.
> Best Martin
>
> Shannon Kogachi wrote:
>>
>>
t works for stats files (long_stats_slopes) in
> the same way.
>
> How many time points do you have, how far apart (equally spaced?).
>
> Best, Martin
>
> On Wed, 2012-09-26 at 14:59 -1000, Shannon Kogachi wrote:
> > Hi Martin,
> >When I used the long_mris_slopes command fo
designed for analyzing surface maps (analysis
> on a vertex by vertex basis). This is usually thickness. So I don't
> understand what 'volumes' you mean? For an ROI analysis based on stats
> files you need to use long_stats_slopes.
>
> Best, Martin
>
> On Thu, 2
; across time after they have been resampled to fsaverage. You can find the
> mapped files in the base directories. Can you double check that the average
> is in the middle of the time points?
>
> Best Martin
>
> Shannon Kogachi wrote:
>>
>> Hi Martin,
>> I
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