Dear mailing list,

I am trying to run a LME model using the matlab tools, but I’m unsure how to specify the model we wish to run. We have a qdec file that contains the following columns:
fsid, fsid-abse, years between scans, age at baseline, gender, group

We want to specify a model where we can examine four interaction terms (years*age, years*group, age*group, years*age*group), as well as random effects for the intercept, years and age. My questions are:
1. How do we specify a model that will include the random effects we want?
2. How do we compare our full model (3 random effects) with a model excluding the random effect for age?

Kind regards,

Bronwyn Overs
Research Assistant

Neuroscience Research Australia
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