RESEARCH ARTICLE


Consistency of the Kaplan-Meier Estimator of the Survival Function in Competiting Risks



Didier Alain Njamen Njomen1, *, Joseph Wandji Ngatchou2
1 Department of Mathematics and Computer Sciences, Faculty of Science, University of Maroua, Maroua, Cameroon
2 Institut Elie Cartan de Lorraine, University of Lorraine, Nancy, France


Article Metrics

CrossRef Citations:
0
Total Statistics:

Full-Text HTML Views: 1634
Abstract HTML Views: 751
PDF Downloads: 435
ePub Downloads: 326
Total Views/Downloads: 3146
Unique Statistics:

Full-Text HTML Views: 646
Abstract HTML Views: 415
PDF Downloads: 255
ePub Downloads: 164
Total Views/Downloads: 1480



© 2018 Njomen et al.

open-access license: This is an open access article distributed under the terms of the Creative Commons Attribution 4.0 International Public License (CC-BY 4.0), a copy of which is available at: https://creativecommons.org/licenses/by/4.0/legalcode. This license permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited.

* Address correspondence to this author at the Department of Mathematics and Computer Sciences, Faculty of Science, University of Maroua, Maroua, Cameroon; Tel: +237 675 27 65 20; E-mails: didiernjamen1@gmail.com / didier.njamen@univ-maroua.cm


Abstract

Introduction:

In this article, we only focus on the probability distributions of the breakdown time whose causes are known, and we consider a partition of the observations into subgroups according to each of the causes as defined in Njamen and Ngatchou [1]. By adapting the stochastic processes developed by Aalen [2, 3], we derive a Kaplan-Meier [4] nonparametric estimator for the survival function in competiting risks.

Result & Discussion:

In a region where there is at least one observation, we prove on one hand that this new nonparametric estimator is unbiased in competiting risk and on the other hand, using the Lenglart inequality, we establish its uniform consistency in competiting risks.

Keywords: Censored data, Counting process, Survival function, Competiting risks, Kaplan-Meier estimators, Bias of an estimator, Uniform consistency.