Re: [Freesurfer] Confusion about discrete variable in the FSGD file

2021-11-08 Thread Douglas N. Greve
On 10/27/2021 11:39 AM, Douglas N. Greve wrote: Dealing with discrete variables as discrete is the way I would do it as you would not have any reason to think that there is some linear relationship between your the (arbitrary) values you assign to discrete variables and thickness. Age is no

Re: [Freesurfer] Confusion about discrete variable in the FSGD file

2021-10-27 Thread Douglas N. Greve
Dealing with discrete variables as discrete is the way I would do it as you would not have any reason to think that there is some linear relationship between your the (arbitrary) values you assign to discrete variables and thickness. Age is not an arbitrary value, so I would use that as a con

[Freesurfer] Confusion about discrete variable in the FSGD file

2021-10-27 Thread Thalhammer, Melissa
External Email - Use Caution Dear FreeSurfer users, I am interested in cortical thickness differences between preterm (PT) and fullterm (FT) individuals. I have used DODS with mri_glmfit and wanted to regress out scanner (4 sites) and sex in the analysis, using the attached FSG