Hi Alex, you can compute the difference in those slopes using an appropriate contrast matrix passed to mri_glmfit. QDEC should do so autotmatically (this would be an interaction between group and age). doug

Alex Hanganu wrote:

Dear Freesurfer Experts,

We have two groups at similar ages and the thickness-age correlation shows many cluster of significant values. Pointing to this maximum the plots present similar regressions coefficients for both groups. Actually it would be intresting to have the regions were the thickness – age correlation differ.

Or what is the physiological meening of this kind of correlations ??

Sincerely, Sergiu, Alex.

---

---

Freesurfer mailing list Freesurfer@nmr.mgh.harvard.edu https://mail.nmr.mgh.harvard.edu/mailman/listinfo/freesurfer