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Re: st: Problem recreating SE and CI using e(V) from logistic, stcox etc
From
Maarten buis <[email protected]>
To
[email protected]
Subject
Re: st: Problem recreating SE and CI using e(V) from logistic, stcox etc
Date
Thu, 29 Apr 2010 08:20:09 -0700 (PDT)
--- On Thu, 29/4/10, Lee, William wrote:
> I am wanting to extract figures from a regression model,
> but find large differences between the SE as calculated from
> the variance covariance matrix and that which appears in the
> output. First using stcox, and since replicated in logistic.
> What is odd is that the CIs (calculated from my SE) agree to
> many decimal places with each other.
Here is at least a partial answer (why your method got the
right confidence intervals):
http://www.stata.com/support/faqs/stat/2deltameth.html
Hope this helps,
Maarten
--------------------------
Maarten L. Buis
Institut fuer Soziologie
Universitaet Tuebingen
Wilhelmstrasse 36
72074 Tuebingen
Germany
http://www.maartenbuis.nl
--------------------------
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