Message-ID: <Pine.LNX.4.64.0512130645040.28169@homer21.u.washington.edu>
Date: 2005-12-13T14:45:50Z
From: Thomas Lumley
Subject: Problem with understanding output of Cox model
In-Reply-To: <BBD6B096C5BCAE4E80CC7423CD9532D766CD43@DL140.nina.no>
On Tue, 13 Dec 2005, May, Roel wrote:
> Hi all,
>
> I am using a 'tricked' Cox Hazard regression model for discrete choice
> habitat modelling.
> However, I'm having a hard time understanding the meaning of the first
> line the following part of the summary() output:
>
> Rsquare= 0.307 (max possible= 0.475 )
> Likelihood ratio test= 91.8 on 12 df, p=2.23e-14
> Wald test = 26.3 on 12 df, p=0.00977
> Score (logrank) test = 58.6 on 12 df, p=4.03e-08
>
> Does anyone know how I can read the 'max possible' R-square? What does
> it signify?
It doesn't signify anything very useful. It is the proportional reduction
in deviance.
-thomas