Date: Tue, 30 Sep 2003 15:02:46 -0400
Reply-To: Laurel Copeland <laurel.copeland@MED.VA.GOV>
Sender: "SAS(r) Discussion" <SAS-L@LISTSERV.UGA.EDU>
From: Laurel Copeland <laurel.copeland@MED.VA.GOV>
Subject: Proportion of Variance Explained by Each Predictor in Logistic
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I would like to calculate the proportion of the variance explained by each
predictor in a multiple logistic regression (see for example Lai et al.
(2002) Urology 56:108-115, Radical prostatectomy: geographic and
Lai et al. wrote their own program to do this (I don't know in what – maybe
I have received a macro that calculates some R2 values by pulling out of
PROC LOGISTIC the INTERCEPT (OUT=...) and XBETA and P (OUTEST=...) and
going on from there, but it does not calculate the contributions to PVE
from each predictor.
Does anyone know how to do this?
Ann Arbor MI