JSM 2004 - Toronto

Abstract #300894

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Activity Number: 307
Type: Contributed
Date/Time: Wednesday, August 11, 2004 : 8:30 AM to 10:20 AM
Sponsor: Biopharmaceutical Section
Abstract - #300894
Title: Goodness of Fit of Relative Survival Models
Author(s): Janez Stare*+ and Maja Pohar and Robin Henderson
Companies: Univerza v Ljubljani, Slovenija and Univerza v Ljubljani, Slovenija and University of Lancaster
Address: Medicinska fakulteta, Vrazov trg 2, Ljubljana, 1000, Slovenia
Keywords: relative survival ; regression models ; goodness of fit
Abstract:

Additive regression models in relative survival studies are preferred over multiplicative models by some authors. Such preferences are mainly grounded in practical experience with mostly cancer registries data, where the basic assumption of the additivity of hazards is more likely to be met. Additive models are by definition not suited for data containing subsets of subjects living longer than the general population. Multiplicative models have no such limitations. We study goodness of fit of models based on a recently introduced individual measure of relative survival. We show that such models are more flexible than standard additive models and will satisfactorily fit very different kinds of data.

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