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Biometrika 1990 77(1):207-211;
© 1990 by Biometrika Trust
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MISCELLANEA

A modified log rank test for competing risks with missing failure type

ELS GOETGHEBEUR and LOUISE RYAN

Statistical Research Unit, Limburgs Universitair Centrum 3610 Diepenbeek, Belgium
Department of Biostatistics, Harvard School of Public Health Boston, Massachusetts 02115, U.S.A.

Received for publication 1 June 1988. Revision received 1 March 1989.
  Abstract

We propose a modified log rank test for the analysis of competing risks survival data, when failure type is missing for some individuals. The proposed test reduces to a standard log rank test when all failure types are known. The test arises from a partial likelihood, constructed under semiparametric assumptions on the relationship between cause-specific hazards.

Key Words: Cause of death • Proportional hazards • Score test


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