How to write a GEE model in SAS ?!

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How to write a GEE model in SAS ?!

Hi,

Could anyone help me to implement the correct GEE model in sas?!

I have a dataset of measurments on patients from two treatment arms at different times. I would like to compare at the endpoint the change from baseline between the two groups.

Each patient of a treatment arm has two scores from each eye (for instance: patient X from group A has a score 7 from the left eye and 6.8 for the right eye at baseline ).

How can I write the adequate model that includes the correlation due to the two scores from a patient?!

Thanks

SAS Super FREQ
Posts: 3,475

Re: How to write a GEE model in SAS ?!

There are examples in the doc and in papers on using PROC GENMOD to analyze GEE models. Perhaps some of these will help.

http://www.lexjansen.com/wuss/2006/tutorials/TUT-Smith.pdf

http://www.nesug.org/Proceedings/nesug97/stat/stokes.pdf

or the doc

SAS/STAT(R) 12.3 User's Guide

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