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I am working on data for 10 years that has counts of hospitalization and population size by countries. I also have other covariates that I need to control for.

Using GEE Poisson regression, and autoregressive correlation structure, the p-value for z-statistics for parameter estimate and Type3(Score test) results don't match for some continuous variables.

(IN SAS I have used PROC GENMOD; REPEATED statement with link=Poisson, Type=AR and offset=popsize)

What can be going on?

I am not able to share the data or results due to data confidentiality.

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