Author/Editor		Stare, J
Title		On choosing a measure of explained variation for Cox models
Type		članek
Source		In: Ferligoj A, Kramberger A, editors. Developments in data analysis. Metodološki zvezki 12. Ljubljana: Fakulteta za družbene vede,
Publication year		1996
Volume		str. 49-62
Language		eng
Abstract		The have been several attempts to extend the notion of explained variation to models for analyzing lifetime data, Cox models in particular. Most of the authors have concentrated on overcoming the difficulty of using the censored observations in the calculations, but did not pay enough attention to other, equally important issues. We present a list of properties that a measure of explained variation for the Cox model should have, and discuss these properties with reference to the measures by Kent and O'Quigley and by Korn and Simon. We show that only the approach by Kent and O'Quigley gives good results. We also stress the need for the use of such measures in survival studies.
Descriptors		LIFE TABLES REGRESSION ANALYSIS MYOCARDIAL INFARCTION SURVIVAL ANALYSIS PROPORTIONAL HAZARDS MODELS