Paul,
The Stata command you cite provides exact confidence limits for an
incidence density. You could use approximations for the Poisson to get
confidence intervals, but why? I consider the exact limits the "deluxe"
method.
-----Original Message-----
From: [email protected]
[mailto:[email protected]] On Behalf Of Paul O'Brien
Sent: Saturday, February 22, 2003 4:54 PM
To: [email protected]
Subject: st: Confidence intervals for incidence rate
I want to calculate the CI for a single incidence density:
5 pregnancies in 5240 months of exposure.
The delta method has been recommended. Can I use it in Stata?
There is the poisson:
.cii #exposure #events, poisson [ level(#) ]
Epitab give CIs for the incidence rate ratio in - irr -, but not for the
individual incidence rates.
Thanks
Paul
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