05 May 2016 4 1K Report

I am doing a mixed effect linear model using SPSS for my collaborated project and need your advice. The study is an RCT with 2 groups and 6 time points. We would like to test a 2 X 6 (group X time) interaction to see the change of score over the treatment period.

  However, the main outcome measure was significantly different at baseline (P = 0.001). My question is:

How to adjust for baseline measure in mixed effect model using SPSS? I know it can be done in Stata but not sure how to do it in SPSS.

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