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1. Exact meaning of "rsquare" at end of summary(coxph) (score: 1): Author: "Hunsicker, Lawrence" <lawrence-hunsicker@uiowa.edu>; Date: Mon, 5 Jan 2004 09:31:43 -0600; Another question for the coxph gurus: At the end of the print out of summary(coxph) there is a line that reads: "Rsquare= 0.316 ( max possible= 0.97 )" (Numbers vary, of course, depending on the mode; /archives/html/s-news/2004-01/msg00005.html (8,388 bytes)
2. Re: Exact meaning of "rsquare" at end of summary(coxph) (score: 1): Author: Terry Therneau <therneau@mayo.edu>; Date: Mon, 5 Jan 2004 10:11:12 -0600 (CST); There are dozens of definitions for an R-square for a Cox model. I really liked the following paper Korn, Edward L. , and Simon, Richard (1990), ``Measures of explained variation for survival data'',; /archives/html/s-news/2004-01/msg00006.html (8,586 bytes)
3. n (score: 1): Author: "Hunsicker, Lawrence" <lawrence-hunsicker@uiowa.edu>; Date: Wed, 7 Jan 2004 09:00:30 -0600; Terry and all: I appreciate deeply Terry's point about it not being clear what reduction of unexplained variability means in a Cox analysis, and that there are not unique definitions of this concept.; /archives/html/s-news/2004-01/msg00020.html (10,080 bytes)
4. e (score: 1): Author: Ravi Varadhan <rvaradha@jhsph.edu>; Date: Wed, 07 Jan 2004 13:52:50 -0500; There is also a nice paper by Kent and Quigley (Biometrika, 1988) that describes a measure of dependence between the explanatory variables and the response variable, under more general regression se; /archives/html/s-news/2004-01/msg00022.html (11,827 bytes)

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