Hi all:
I'm a little confused about the DODS model and DOSS model. I have two
groups (patient and control) and one covariate (age), and I want to compare the
diffirence of thickness between the groups with age as the covariate. In DODS
model, is the process the analysis of variance substantially (group is a factor
and age is another factor)?
Generally, if there is no interaction between age and group, then i can
re-run with the DOSS model to increase the statistical power.But i don't know
how to determine whether there is no interaction . I hope someone give me some
suggestions._______________________________________________
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