| To: | s-news@lists.biostat.wustl.edu |
|---|---|
| Subject: | MISSING OBS IN REPEATED MEASURE DESIGN |
| From: | duo wan <duo_wan@yahoo.com> |
| Date: | Wed, 12 May 2004 20:56:51 -0700 (PDT) |
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Hi, I have a data set consisting of 3 treatment groups and 1 control group (10 subjects per group); at each of 8 time points, tumor sizes were measured. However, subjects in control group were dying at last 3 time points and none survived in the last time point. Since there are no observations for control group in the last time point, is it reasonable to drop all the observations in the last time point or do some kind of imputation? The main interest is to find out if 3 treatments can reduce tumor size. Any suggestion will be appreciated. Vincent wan
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