G'day all, I have run into a bit of a problem. In the ASDAR book it shows a method for calculating Confidence Intervals for Standardised Morbidity Ratios using the epitools pois.exact function - but my data is overdispersed. Is there a similar function that anyone knows of for negative binomial? cheers Ben
Confidence intervals for non-poisson distributed SMR's
2 messages · Ben Madin, Virgilio Gomez Rubio
Dear Ben,
I have run into a bit of a problem. In the ASDAR book it shows a method for calculating Confidence Intervals for Standardised Morbidity Ratios using the epitools pois.exact function - but my data is overdispersed.
The example based on the Poisson-Gamma model will provide credible intervals (because it is a Bayesian model) of the relative risks for over-dispersed data. It is also in the chapter on disease mapping in ASDAR. Hope this helps, Virgilio