Thanks Doug,

That seem to work for some of my variables (e.g. depression) when I put gender and diagnosis as fixed factors, depression as covariate, and age as nuisance factor but not for others (e.g. anxiety). I keep getting error messages when trying to run some of my variables as covariates (please see attached). Is there anything I can do to fix this?

Thanks,

Jen

From: freesurfer-bounces@nmr.mgh.harvard.edu <freesurfer-bounces@nmr.mgh.harvard.edu> on behalf of Douglas N Greve <greve@nmr.mgh.harvard.edu>
Sent: 19 January 2017 21:48
To: freesurfer@nmr.mgh.harvard.edu
Subject: Re: [Freesurfer] QDEC - Controlling for gender

Just include it as a categorical factor. When you look at your contrast
of interest, it will be with respect to regressing out gender

On 01/15/2017 08:55 PM, Jennifer Szeto wrote:
>
> Hi Freesurfer experts,
>
>
> I am trying to compare cortical thickness between groups while
> controlling for age and gender using QDEC. However, _gender_ is not
> showing up as a covariate variable or a nuisance factor (only showing
> up as a fixed factor), I am wondering how I could control for gender
> in this case?
>
>
> Thank you very much,
>
> Jen
>
>
>
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