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