[R-sig-ME] Partialing out the effect of a covariable in a Poisson GLMM

[v_coudrain at voila.fr]

Dear all,
I recenly asked a question about the use of an offset in a Poisson GLMM and it came out that an ofset would be reasonable if the estimate of the covariable to be put 
as an offset is about 1. However if this estimate is not close to one, does anybody know about a partial linear regression equivalent for a Poisson GLMM? Or what 
are your method to control for the effect of a covariable in a Poisson GLMM?
Best wishes,
Valerie
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