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
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
Just specify gender as a factor then look at the contrasts where it says that gender is accounted for or regressed out. There is really no difference between a factor of interest and a nuisance factor, it is only a matter of interpretation
On 11/18/2015 02:04 PM, Tesse, Marcello wrote:
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
Freesurfer mailing list Freesurfer@nmr.mgh.harvard.edu https://mail.nmr.mgh.harvard.edu/mailman/listinfo/freesurfer
freesurfer@nmr.mgh.harvard.edu
-
Douglas N Greve -
Tesse, Marcello