NONPARAMETRIC ESTIMATION OF CONDITIONAL CUMULATIVE HAZARDS FOR MISSING POPULATION MARKS

Authors: Bandyopadhyay, Dipankar; Pumar, Amalia Jácome

Source: Australian & New Zealand Journal of Statistics, Volume 52, Number 1, March 2010 , pp. 75-91(17)

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Abstract:

Summary

A new function for the competing risks model, the conditional cumulative hazard function, is introduced, from which the conditional distribution of failure times of individuals failing due to cause j can be studied. The standard Nelson-Aalen estimator is not appropriate in this setting, as population membership (mark) information may be missing for some individuals owing to random right-censoring. We propose the use of imputed population marks for the censored individuals through fractional risk sets. Some asymptotic properties, including uniform strong consistency, are established. We study the practical performance of this estimator through simulation studies and apply it to a real data set for illustration.

Keywords: competing risks; fractional risk set; Nelson-Aalen; right-censoring

Document Type: Research article

DOI: http://dx.doi.org/10.1111/j.1467-842X.2009.00567.x

Publication date: 2010-03-01