Risk ratio from beta regression coefficient, SIR as dependent?

["Dora C PEARCE" <dpearce@students.ballarat.edu.au>]

Dear List Members,
I have modelled standardised incidence ratios (SIRs), estimated for each of 61 
small geographic areas, as the dependent variable in spatial autoregressive 
(CAR) models using S+SpatialStats, against a continuous measure of an 
environmental pollutant.

I would like to estimate a risk ratio (relative risk; RR) and 95% CI from the 
beta coefficient estimated for the pollutant variable?

I would be most grateful for advice on how to obtain the RR estimate.

Thank you in advance,
Dora




Dora Pearce
PhD student
School of Science & Engineering
University of Ballarat
PO Box 663, Ballarat, Victoria, 3353
Email: dpearce@students.ballarat.edu.au
Ph: (03) 5327 9264