[R] Longitudinal categorical response data

From: Rasanga Ruwanthi <ruwanthi_kdr_at_yahoo.com>
Date: Thu, 24 Mar 2011 10:22:01 -0700 (PDT)

Dear List,

I have some longitudinal data, each patient was followed at times 0, 12, 16, 24 weeks and measure severity of a illness (0-worse, 1-same, 2-better). So, longitudinal response is categorical.  I was wondering whether lmer in R can fit a model for this type of data. If so, how we code? Or any other function in R that can fit this type of longitudinal data? Any suggestion would be greatly appreciated.


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