See if one of these examples works for you

http://surfer.nmr.mgh.harvard.edu/fswiki/FsgdExamples

having two covariates is a straight forward extension of one

​Hi Freesurfer experts,

I am looking at the effect of a genetic risk score (GRS) on cortical surface/thickness. I have two groups: patients, controls (male and female). 

GroupDescriptorFile 1

Title GRS_all_lh_surf_fwhm10

MeasurementName thickness

Class SexFemaleControl

Class SexMaleControl

Class SexFemalePatient

Class SexMalePatient

I want to include total brain volume and age as covariates. Is this possible using an fsgd file? Is there an example you could give? ​

Any advice would  be great.

Thanking you in advance

Donna

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