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From |
"Kieran McCaul" <kamccaul@meddent.uwa.edu.au> |

To |
<statalist@hsphsun2.harvard.edu> |

Subject |
RE: st: RE: survival analysis: an elementary question |

Date |
Sat, 4 Oct 2008 11:33:06 +0800 |

If your program is actually calculating the CI around the HR and you're getting a negative lower bound, then you must be doing something wrong in the calculation. ______________________________________________ Kieran McCaul MPH PhD WA Centre for Health & Ageing (M573) University of Western Australia Level 6, Ainslie House 48 Murray St Perth 6000 Phone: (08) 9224-2140 Fax: (08) 9224 8009 email: kamccaul@meddent.uwa.edu.au http://myprofile.cos.com/mccaul _______________________________________________ The fact that no one understands you doesn't make you an artist. -----Original Message----- From: owner-statalist@hsphsun2.harvard.edu [mailto:owner-statalist@hsphsun2.harvard.edu] On Behalf Of Michael McCulloch Sent: Saturday, 4 October 2008 11:18 AM To: statalist@hsphsun2.harvard.edu Subject: Re: st: RE: survival analysis: an elementary question Sorry Kieran I wasn't clear. Yes, about the hazard ratio. And thank you for clarifying. >Are you looking at the hazard ratio or the beta coefficient? The CI >around the HR can't be negative, but it can be negative around the beta. > >______________________________________________ >Kieran McCaul MPH PhD >WA Centre for Health & Ageing (M573) >University of Western Australia >Level 6, Ainslie House >48 Murray St >Perth 6000 >Phone: (08) 9224-2140 >Fax: (08) 9224 8009 >email: kamccaul@meddent.uwa.edu.au >http://myprofile.cos.com/mccaul >_______________________________________________ >The fact that no one understands you doesn't make you an artist. > > >-----Original Message----- >From: owner-statalist@hsphsun2.harvard.edu >[mailto:owner-statalist@hsphsun2.harvard.edu] On Behalf Of Michael >McCulloch >Sent: Saturday, 4 October 2008 11:02 AM >To: Statalist >Subject: st: survival analysis: an elementary question > >Hello, >Is it theoretically possible for the 95% confidence interval about >the hazard ratio to include 0, such that the lower bound is a >negative number? I've encountered into this with a program I've >written (too long to post here, and I don't want to bother anyone), >but I'm certain I've done something incorrectly. Might someone have a >moment to clarify this question? > > >-- > >Best wishes, >Michael McCulloch > > > >Pine Street Foundation >124 Pine St., San Anselmo, CA 94960-2674 >Tel: (415) 407-1357 >Fax: (415) 485-1065 >mcculloch@pinestreetfoundation.org >www.pinestreetfoundation.org >* >* For searches and help try: >* http://www.stata.com/help.cgi?search >* http://www.stata.com/support/statalist/faq >* http://www.ats.ucla.edu/stat/stata/ > > > >* >* For searches and help try: >* http://www.stata.com/help.cgi?search >* http://www.stata.com/support/statalist/faq >* http://www.ats.ucla.edu/stat/stata/ * * For searches and help try: * http://www.stata.com/help.cgi?search * http://www.stata.com/support/statalist/faq * http://www.ats.ucla.edu/stat/stata/ * * For searches and help try: * http://www.stata.com/help.cgi?search * http://www.stata.com/support/statalist/faq * http://www.ats.ucla.edu/stat/stata/

**Follow-Ups**:**RE: st: RE: survival analysis: an elementary question***From:*Michael McCulloch <mm@pinest.org>

**References**:**st: survival analysis: an elementary question***From:*Michael McCulloch <mm@pinest.org>

**st: RE: survival analysis: an elementary question***From:*"Kieran McCaul" <kamccaul@meddent.uwa.edu.au>

**Re: st: RE: survival analysis: an elementary question***From:*Michael McCulloch <mm@pinest.org>

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