[R] Odds Ratio from Logistic Model

[Mark Myatt]

Stefano <stecalza at tiscalinet.it> writes:
>Hi all.
>
>A simple question.
>Is there a function to compute the Odds Ratio and its confidence intervall, from 
>a logistic model (glm(.......,family=binomial....). I've written my own, but 
>certainly someone did a better job.

I show a simple function to do this in my introductory notes available
from:

        http://www.myatt.demon.co.uk

basically it is:

        lreg.or <- function(model)
          {
          lreg.coeffs <- coef(summary(salex.lreg))
          lci <- exp(lreg.coeffs[ ,1] - 1.96 * lreg.coeffs[ ,2])
          or <- exp(lreg.coeffs[ ,1])
          uci <- exp(lreg.coeffs[ ,1] + 1.96 * lreg.coeffs[ ,2])
          lreg.or <- cbind(lci, or, uci)        
          lreg.or
          }


--
Mark Myatt


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