Dear experts,
we'd like to compare regional cerebral glucose metabolism (FDG-PET) in 4
groups of subjects: 3 groups of patients with Alzheimer and a control
group. There is a significant difference between mean age of 2 patient
groups and the control group. Therefore, i'd like to covariate the effect
of age out. Is the model "single subjects: conditions and covariates" with
4 conditions (groups) and age as a nuisance variable a proper one? How
should i define contrast in order to account for age?
Many thanks
Igor
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Igor Yakushev
Department of Nuclear Medicine
University of Mainz
Germany
phone 0049/6131/176739
fax 0049/6131/172386
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