Stata The Stata listserver
[Date Prev][Date Next][Thread Prev][Thread Next][Date index][Thread index]

Re: st: -binreg- (was: ORs for non-rare outcomes)

From   "roger webb" <[email protected]>
To   [email protected]
Subject   Re: st: -binreg- (was: ORs for non-rare outcomes)
Date   Wed, 14 Apr 2004 12:01:41 +0100

I've found that the problems encountered in trying to fit log-binomial 
models (using either 'binreg' or 'glm link(log) family(binomial)') can 
be overcome by using the 'modified' Poisson regression approach 
proposed by Zou (Am J Epidemiol 2004; 159: 702-706). This entails 
fitting a Poisson model with a robust variance estimator, i.e.:

poisson y x1 x2..., robust irr

This produces the same Risk Ratio (and SE) as the binomial 
model, without failing to converge with covariate adjustment.

Roger Webb
University of Manchester (UK) 

On 14 Apr 04, at 11:43, Ron�n Conroy wrote:

on 09/04/2004 02:18, [email protected] at [email protected] wrote:

> Dear people:
> I agree. Anyway, the -binreg- command would be really a good solution, if it
> would run more often than not run. Indeed, it seems that the odds of binreg be
> able to run is less than 1.

I agree, but don't be afraid of mixing -binreg- regressions with -logistic-.
I reviewed a good paper a while back that used -binreg- for about two thirds
of the models and, where it couldn't find a plausible solution, -logistic-
for the rest. 

Ronan M Conroy ([email protected])
Lecturer in Biostatistics
Royal College of Surgeons
Dublin 2, Ireland
+353 1 402 2431 (fax 2764)

Just say no to drug reps

This email and any files transmitted with it are confidential and
intended solely for the use of the individual or entity to whom
they are addressed.
If you have received this email in error please notify the
originator of the message. This footer also confirms that this
email message has been scanned for the presence of computer viruses.

Any views expressed in this message are those of the individual
sender, except where the sender specifies and with authority,
states them to be the views of The Royal College Of Surgeons in Ireland.

*   For searches and help try:

*   For searches and help try:

© Copyright 1996–2024 StataCorp LLC   |   Terms of use   |   Privacy   |   Contact us   |   What's new   |   Site index