FreeSurfer Experts, Hello I am attempting to perform a two stage longitudinal analysis. My entire data set has two time points for each participant. I understand that the subject order in the FSGD file should correspond with the QDEC file run through long_mris_slopes. In my case the FSGD file has half as many inputs as the QDEC file.
My question is would I take the covariates from TP1 and TP2 and take the average to input into the FSGD file? If that is the case is there anything wrong with performing the long_qdec_table --qdec "qdec.table.dat --cross --out "cross.qdec.table.dat" command and using that co-variate data to input into the FSGD file? Respectfully, -Tim Timothy Hendrickson Department of Psychiatry University of Minnesota Mobile: 507-259-3434 (texts okay)
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