Hello, I am using Proc Mixed for a 3 condition, 3 time point repeated measures analysis. I am attempting to use an estimate statement to assess change over time for the (1) 2 treatment conditions combined compared to the control condition and (2) the 2 treatment conditions compared to each other. I have searched notes and read everything I could find about the coding for estimates but I am still not getting it right. I don't understand how to code to compare the change over time across the groups rather than the group averages across the 3 time points. To simplify, I tried coding to compare Time 1 to Time 2 only, but it's still not working. Here is some of the code I have tried to calculate (1) above: proc mixed data=e1_long; class condition time ID; model intent = condition time condition*time /solution; repeated time/subject=id type=ar(1); estimate 'Both Tx vs. Control-T1 vs T2' time 1 -1 0 /*this coding will creates an estimate, but the way the condition*time is split up is wrong*/ condition 1 -.5 -.5/e; estimate 'Both Tx vs. Control-T1 vs T2' time 1 -1 0 /*this coding will not create an estimate*/ condition*time .3333 .3333 0 -.167 -.167 0 -.167 -.167 0/E; lsmeans condition*time ; run; Can anyone help me with this coding?
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