Message-ID: <2C48B9FC-D66C-4825-8CE9-E0F89F39A318@gmail.com>
Date: 2015-04-15T13:54:50Z
From: Peter Dalgaard
Subject: What does exp(-coef) mean?
In-Reply-To: <1429096284336-4705897.post@n4.nabble.com>
On 15 Apr 2015, at 13:11 , Anniek <anniek at brinkonline.nl> wrote:
> I know that exp(coef) is the Hazard Ratio, but in a certain output posted
> down here also a exp(-coef) is present.
>
> exp(coef) exp(-coef) lower .95 upper .95
> ns(CD4, 4)1 0.29058 3.4413 0.144075 0.5861
> ns(CD4, 4)2 0.09870 10.1316 0.029075 0.3351
> ns(CD4, 4)3 0.03475 28.7806 0.007375 0.1637
> ns(CD4, 4)4 0.10211 9.7933 0.019234 0.5421
> drug[T.ddI] 1.31900 0.7582 0.989748 1.7578
> AZT[T.failure] 1.46116 0.6844 1.087839 1.9626
>
> What does exp(-coef) mean?
>
The inverse hazard ratio. (As in e^-x = 1/e^x).
> Thank you in advance!
>
>
>
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--
Peter Dalgaard, Professor,
Center for Statistics, Copenhagen Business School
Solbjerg Plads 3, 2000 Frederiksberg, Denmark
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Office: A 4.23
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