Longitudinal data - GEE
10 important questions on Longitudinal data - GEE
Which 5 correlation matrix structures can you choose from?
Autoregressive
M-dependent
Unstructured
Independend
What is an exchangeable correlation matrix structure?
What is an Autoregressive correlation matrix structure?
2 time intervals = rho^2
3 time intervals = rho^3
etc.
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What is an unstructured correlation matrix structure?
How much coefficients do you have to determine with an unstructured structure?
What is a pro and a con for unstructured structure?
con: its very inefficient
What is the formula for approximating R2 with GEE analysis?
R2 = proportion of variance explained
variance (model) = scale parameter (on top of the output)
Variance (y) = Variance of your outcome. This is done by squaring your standard deviation of Y.
Which correlation structure is often used for GEE analysis with logistic regression? Why?
How can you decide the R2 of GEE with logistic regression?
Which GEE is the same as what kind of mixed model analysis?
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