Hello FreeSurfer Developers,

 

I'm attempting to compare longitudinal cortical thinning rates (pc1) between 3 groups using mri_glmfit using FreeSurfer 6.0. The tutorial suggests that you could use the multiple comparisons corrections that come with it but does not comment on using the mri_glmfit-sim option. 

 

I just want to confirm whether there is anything prohibiting me from using mri_glmfit-sim. Are there any set of parameters that should be set differently when using pc-1 instead of thickness files?

 

Also, would you do a stricter correction and stick to the longitudinal model or prefer the linear mixed effects model and do a FDR? How do you decide between the two?

 

Thanks!

Swati