Semiparametric estimation of survival function when data are subject to dependent censoring and left truncation

2010 ◽  
Vol 80 (3-4) ◽  
pp. 161-168
Author(s):  
Pao-sheng Shen
Keyword(s):  
Survival Function ◽  
Semiparametric Estimation ◽  
Dependent Censoring ◽  
Left Truncation

Survival forests for data with dependent censoring

2017 ◽  
Vol 28 (2) ◽  
pp. 445-461 ◽  
Author(s):  
Hoora Moradian ◽  
Denis Larocque ◽  
François Bellavance
Keyword(s):  
Survival Data ◽  
Survival Function ◽  
Real Data ◽  
Dependent Censoring ◽  
Right Censoring ◽  
True Time ◽  
Splitting Rule ◽  
The Individual ◽  
Individual Trees ◽  
Survival Forests

Tree-based methods are very powerful and popular tools for analysing survival data with right-censoring. The existing methods assume that the true time-to-event and the censoring times are independent given the covariates. We propose different ways to build survival forests when dependent censoring is suspected, by using an appropriate estimator of the survival function when aggregating the individual trees and/or by modifying the splitting rule. The appropriate estimator used in this paper is the copula-graphic estimator. We also propose a new method for building survival forests, called p-forest, that may be used not only when dependent censoring is suspected, but also as a new survival forest method in general. The results from a simulation study indicate that these modifications improve greatly the estimation of the survival function in situations of dependent censoring. A real data example illustrates how the proposed methods can be used to perform a sensitivity analysis.

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