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st: How is IRR in -nbreg- calculated?
I tried to find, how is the IRR in -nbreg- estimated. I know, that all - OR in -logistic-, RRR in -mlogit- and IRR in -poisson- and -nbreg- are just univariate transformations of the estimated Betas for the respective commands. Then the question probably should be: how the Betas are estimated in -logistic-, -mlogit- and -nbreg-?
Can I be sure, that IRR from -nbreg- is realy incidence-rate ratio (in epidemiological sence) and not the odds ratio?
Thanks in advance!
The Research Unit for General Practice
University of Aarhus
Vennelyst Blv. 6
DK-8000 Aarhus C
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