Coefficients, OR and 95% CL

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-----Original Message-----
From: r-help-bounces at r-project.org [mailto:r-help-bounces at r-project.org]
On Behalf Of Jorge Ivan Velez
Sent: Monday, September 22, 2008 5:36 PM
To: Luciano La Sala
Cc: R mailing list
Subject: Re: [R] Coefficients, OR and 95% CL

Dear Luciano,
See ?logistic.display in the epicalc package. If glm1 is your model,
something like

logistic.display(glm1)

should do the job.


HTH,


Jorge


On Mon, Sep 22, 2008 at 5:28 PM, Luciano La Sala

Dear R-users,

After running a logistic regression, I need to calculate OR by
exponentiating the coefficient, and then I need the 95% CL for the OR

as

well. For the following example (taken from P. Dalaagard's book), what

would

be the most straightforward method of getting what I need? Could

anyone

enlight me please?

Thank you!
Lucho

summary(glm(menarche~age,binomial))

Call:
glm(formula = menarche ~ age, family = binomial)

Deviance Residuals:
    Min        1Q    Median        3Q       Max
-4.68654  -0.13049  -0.01067   0.09608   2.35254

Coefficients:
           Estimate Std. Error z value Pr(>|z|)
(Intercept) -17.9175     1.7074  -10.49   <2e-16 ***
age           1.3549     0.1296   10.45   <2e-16 ***
---
Signif. codes:  0 '***' 0.001 '**' 0.01 '*' 0.05 '.' 0.1 ' ' 1

(Dispersion parameter for binomial family taken to be 1)

   Null deviance: 974.31  on 703  degrees of freedom
Residual deviance: 223.95  on 702  degrees of freedom
 (635 observations deleted due to missingness)
AIC: 227.95

Number of Fisher Scoring iterations: 9

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