Hello Dr. Greve,
Thank you for your reply. I have set up the qdec.
I have gender as the discrete factor and age and clinical score as continuous factors.
In order to look at the relationship between clinical score and whole brain cortical thickness while accounting for age and gender effects, do I select score as the continuous factor and age as the nuisance factor or should it be the other way round ?
Thanking you in anticipation, Subha ----- Original Message ----- From: Douglas Greve Sent: 05/05/13 11:53 PM To: freesurfer@nmr.mgh.harvard.edu Subject: Re: [Freesurfer] question about glm setup
Hi Subha, yes, you can. You will need to create a table in the format with QDEC expects. Have you looked at the tutorial?
http://surfer.nmr.mgh.harvard.edu/fswiki/FsTutorial/QdecGroupAnalysis
doug
On 5/4/13 11:31 AM, Subhabrata Chaudhury wrote: Hi,
I am new to freesurfer. I have run reconall on 50 AD subjects. I have also run recon-all -qcache.
So I have the following -
1) Whole brain thickness map for each AD subject 2) age of each subject 3) gender of each subject 4) clinical score of each subject
I DO NOT have control subjects.
I want to run a glm to investigate whether if there is a relation between the clinical score for each subject and their cortical thickness while accounting for age, gender and whole brain average thickness.
Can I use qdec for this ?
This is my first time doing this sort of analysis, so I will be grateful if I can get some step-by-step help.
Thank you very much
Subha
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