Tagged Questions

1
vote
2answers
64 views

Testing interaction b/t group & longitudinal change for only part of the age range

I've fit a mixed linear model to some longitudinal data. I'm interested in the differences in patterns of decrease in the dependent variable according to group status, and my hypothesis particularly ...
4
votes
1answer
264 views

Is there a package for R that allows smoothing splines in GEE?

I run into a problem where I would like to build a GEE in R with cubic regression splines (or any other spline type) for a longitudinal data set and an urgent need for grouping and multiple ...