A robust method for proportional hazards regression.

Abstract:

:In this paper we give an informal introduction to a robust method for survival analysis which is based on a modification of the usual partial likelihood estimator (PLE). Large sample results lead us to expect reduced bias for this robust estimator compared with the PLE whenever there are even slight violations of the model. In this paper we investigate three types of violation: (a) varying dependency structure of survival time and covariates over the sample; (b) omission of influential covariates, and (c) errors in the covariates. The simulations presented support the above expectation. Analyses of data sets from cancer epidemiology and from a clinical trial in lung cancer illustrate that a better fit and additional insights may be gained using robust estimators.

journal_name

Stat Med

journal_title

Statistics in medicine

authors

Minder CE,Bednarski T

doi

10.1002/(SICI)1097-0258(19960530)15:10<1033::AID-S

subject

Has Abstract

pub_date

1996-05-30 00:00:00

pages

1033-47

issue

10

eissn

0277-6715

issn

1097-0258

pii

10.1002/(SICI)1097-0258(19960530)15:10<1033::AID-S

journal_volume

15

pub_type

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