Hello SPMers,
I have some questions, could you help me?
I've done a VBM, now I want to do an Ancova, for grey matter, with age and sex as nuisance variables and I want to add the global voxel intensity like a nuisance variable too. Is this variable the same I've obtained in the grey matter column in the volumes.txt file ?
In the other hand, How can I include the global mean voxel value in an alnalysis of covariance? In user specified option (in Global Calculation)? Is the same column in the volumes.txt?
Thanks in advance,
GC Monté
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Gemma C. Monté i Rubio
Physicist. Ph.D-student
Centre de Diagnòtic Per la Imatge, CDI.
Hospital Clínic de Barcelona.
C/ Villarroel, 170
08036 Barcelona-Spain
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telf. + 34 93 227 54 00 - ext. 3464_________________
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