Hi Cat,
first create and save a label of your cluster.

In a terminal, cd to the GLM directory inside qdec directory and then cd 
to the folder of the contrast of interest and run
mri_segstats --id 1 --slabel fsaverage lh yourlabel --i gamma.mgh  --sum 
yourlabel.sum
the output yourlabel.sum will have information about the label including 
the mean gamma (gamma is a map of the contrast values).

Along those same lines, you can run

mri_segstats --id 1 --slabel fsaverage lh yourlabel --i y.mgh  --avgwf 
yourlabel.dat
y.mgh should be there already and is a stack of thickness maps for all 
your subjects
the output yourlabel.dat will be a single column with the average 
thicknesses for each subject

doug



Cat Chong wrote:
> Hello Experts:
> In qdec, I would like to analyze if the thickness- entorhinal volume 
> correlation differs between APOE positive and negative subjects 
> accounting for age.
> I have chosen age as a nuisance variable and entorhinal volume as a 
> covartiate. ( hope this is correct)
> Results show me several clusters of group differences following FDR 
> correction. Here is my question: I would like to know what the mean 
> value differences are between the groups for various clusters. And I 
> would also like to know which group shows less of a correlation for 
> certain clusters.
> Could you tell me where I would find those values?
>
> Best Regards,
> Catherine
>
>
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-- 
Douglas N. Greve, Ph.D.
MGH-NMR Center
gr...@nmr.mgh.harvard.edu
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