Hi Martin,

Do you mean by creating this long.testretest.qdec file, one can then
perform the stats for the longitudinal2StageModel?

So for a 2 timepoints analysis, eg. TP1 & TP2.
 the long.testretest.qdec will be looking like this  ?


fsid                                             fsid-base

tp1_subA.long.TemplatesubA     tp2_subA.long.TemplatesubA
tp1_subB.long.TemplatesubB     tp2_subB.long.TemplatesubB
tp1_subC.long.TemplatesubC     tp2_subC.long.TemplatesubC

.
.
.


Thanks,

Jahanvi



tksurfer fsaverage lh pial -overlay
lh.testretest.thickness-pc1.fwhm15/osgm/sig.mgh


Hi Jahanvi,
>
> long.testretest.qdec is a qdec table in the longitudional format (with the
> fsid-base as the second column).
>
> For test-retest (e.g. same session with subject removal), you usually
> don't need a time column, that is why --generic-time is specified. the qdec
> table would just look like
>
> fsid fsid-base
>
> me me_test
>
> me me_retest
>
> you you_test
>
> you you_retest
>
> ...
>
>
> Best, Martin
>
>
> On 05/08/2017 04:10 PM, jahanvi patel wrote:
> Hello list,
>
> I have a simple question about the LongitudinalTwoStageModel tutorials on
> freesurfer website.
>
> It is from this link
> https://surfer.nmr.mgh.harvard.edu/fswiki/LongitudinalTwoStageModel
>
>
> long_mris_slopes --qdec long.testretest.qdec \
>       --meas thickness \
>       --hemi lh \
>       --sd $SUBJECTS_DIR \
>       --do-pc1 --do-label \
>       --generic-time \
>       --fwhm 15 \
>       --qcache fsaverage \
>       --stack-pc1 lh.testretest.thickness-pc1.stack.mgh \
>       --isec-labels lh.testretest.fsaverage.cortex.label
>
> My question is, what is the content of  long.testretest.qdec ?
> I understood till 1st stage was done, we got only one file which is
> long.qdec.table.dat.
>
> Could anyone help to clarify my question?
>
> Thanks a lot
> Jahanvi
>
>
>
>
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