Dear Dr, Douglas,
Apology if I have written the email to you, but I am try to ask this question on FS list mailsince two days, and nobody answered me.
The email sent to freesurfer@nmr.mgh.harvard.edu is below.
Thank uyou very much, sorry again
MARCELLO

From: Tesse, Marcello
Sent: 18 November 2015 19:04
To: freesurfer@nmr.mgh.harvard.edu
Subject: gender as nuisance factor

Dear FreeSurfer experts,
>
>
> I a PhD student at King's college London.
>
> I am running cortical thickness analysis with QDEC.
>
> I would like to investigate some cortical thickness differences
> between 2 groups,
>
> using as nuisance factors 'age' and 'gender'.
>
>
> No problem at all with age. But the gender as dicotomic variable is
>
> listed on fixed factor in qdec, in design window.
>
> My question is:
>
> how can I run the analysis using 'gender' as nuisance factor??
>
>
>
> thank you very much
>
> MARCELLO