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Re: st: stcox output: p-value and CI don't agree


From   Philip Ryan <philip.ryan@adelaide.edu.au>
To   statalist@hsphsun2.harvard.edu
Subject   Re: st: stcox output: p-value and CI don't agree
Date   Wed, 08 Aug 2007 11:21:39 +0930


I don't see the contradiction.

Presumably you estimated the coefficient using the -nohr- option? So you get the log hazard ratio reported rather than the hazard ratio.
The P value is less than 0.05, the 95% CI does not cross zero. Reject the null either way.

Phil





At 11:09 AM 8/08/2007, you wrote:

Hello,
I've obtained contradictory p-value and 95% confidence interval from -stcox-.
I'm puzzled as I've not seen this before in my studies, and not sure about how to further explore these perplexing results. I'd appreciate any pointers.

------------------------------------------------------------------------------
| Observed Bootstrap Normal-based
| Coef. Std. Err. z P>|z| [95% Conf. Interval]
-------------+----------------------------------------------------------------
tcm | .7626117 .2860169 2.67 0.008 .2020288 1.323195
------------------------------------------------------------------------------

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