07 July 2018 0 7K Report

I am currently analyzing longitudinal data.

Research question: Do the groups differ with regard to change in proportion with cluster symptom from baseline to post intervention (Time 0 to Time 1), controlling for other important variables?

My question: In GEE (SPSS), which a “working correlation structure" that I need to choose and why?

- AR (1),

- Exchangeable,

- M-dependent,

- Unstructured.

Thank you so much!

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