now that I got some responses to a basic question, here's another one...
I found in an article a reference to the possibility of
getting the ICC in S-Plus: "the intra-class correlation coefficient may be
obtained from the off-diagonal elements of the working correlation matrix
called "gee$worcor" (figure 3, p. 1274, in Paul Burton, Lyle Gurrin, Peter Sly (1998).
Extending the simple linear regression model to account for correlated
responses: An introduction to generalized estimating equations and multi-level
mixed modelling, Statistics in Medicine, Volume 17, Issue 11 , Pages 1261 - 1291).
Does anyone know how to get the value of ICC? I've tried
gee$worcor
and
summary(gee$worcor)
after running gee, but this does not do it, I only get
NULL
and respectively
Length Class Mode
0
NULL
... thanks, emil
I am using a command like
gee(formula = Y~ X+ Z+ W, cluster = C, variance = "glm.scale", data = "">
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