Mixed model with repeated measures

[May Blake]

I have this data and would like to conduct a mixed model analysis to determine the following:

Effect of individual capacity measures on survival in each of the treated groups
Effect of median capacity measures on survival in each of the treated groups

I would also like to be able to graph this data if possible. In my real data, visit days can be up to 20 visits with corresponding measures. There are no missing values for any of the subjects.


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* Example generated by -dataex-. For more info, type help dataex
clear
input byte(id visitday treat capacity1 capacity2 capacity3 died) float capacitymedian
30 1 0 22 32 30 1 30
30 2 0 23 34 55 1 34
30 3 0 28 28 43 1 28
30 4 0 25 33 40 1 33
44 1 1  6  4 10 0  6
44 2 1 10  9 12 0 10
44 3 1  6  8  8 0  8
28 1 1 10  5  8 0  8
28 2 1 11 12  9 0 11
28 3 1  8 13 10 0 10
28 4 1  9  8  6 0  8
28 5 1  7  8  9 0  8
28 6 1 11  8 10 0 10
end

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The code I am using is
xtmixed capacitymedian treat#visitday || id:

But this gives me the calculation for each individual visit. What I would like to compare is the treated groups and their differences in survival to see whether survival is improved in the treated groups with higher capacity values.