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error1
2007 May 08
0
Question on bivariate GEE fit
...ivariate longitudinal dataset. As an example say,
i have the data frame with column names
var1 var2 Unit time trt
(trt represents the treatment)
Now suppose I want to fit a joint model of the form for the *i* th unit
var1jk = alpha1 + beta1*timejk + gamma1* trtjk + delta1* timejk:trtjk +
error1jk
var2 = alpha2 + beta2*timejk + gamma2* trtjk + delta2* timejk:trtjk +
error2jk
where j index time and k index the treatment received
Using indicator variables I have been able to fit and run the code for
a bivariate model using unstructured covariance matrix. However,
I want to fit a model for...