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Hi FreeSurfer team,
After running longitudinal FS, and running mri_glmfit using files that measured spc, we found clusters associated with our continuous variable (WMH volume) after controlling for other covariates. I was wondering though, do the values found in cache.th13.abs.y.ocn.dat reflect the change in thickness (as measured by spc) for each subject of the cluster found to be significantly associated? I read other posts that it was a value of thickness of each cluster, but I wasn't sure if the same was true for a longitudinal analysis (spc), as the file contains both positive and negative numbers.
Thanks so much for your help! Batool
The interpretation depends on what you pass mri_glmfit in the --y argument. If you passed it differences in thicknesses, then the .dat file will be differences
On 9/8/2020 12:29 PM, Rizvi, Batool wrote:
External Email - Use Caution
Hi FreeSurfer team,
After running longitudinal FS, and running mri_glmfit using files that measured spc, we found clusters associated with our continuous variable (WMH volume) after controlling for other covariates. I was wondering though, do the values found in cache.th13.abs.y.ocn.dat reflect the change in thickness (as measured by spc) for each subject of the cluster found to be significantly associated? I read other posts that it was a value of thickness of each cluster, but I wasn’t sure if the same was true for a longitudinal analysis (spc), as the file contains both positive and negative numbers.
Thanks so much for your help!
Batool
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Douglas N. Greve -
Rizvi, Batool