A simulation study on cox regression with weighted estimations

Tutkun, N and Demirhan, H 2014, 'A simulation study on cox regression with weighted estimations', Electronic Journal of Applied Statistical Analysis, vol. 26, no. 1, pp. 63-72.


Document type: Journal Article
Collection: Journal Articles

Title A simulation study on cox regression with weighted estimations
Author(s) Tutkun, N
Demirhan, H
Year 2014
Journal name Electronic Journal of Applied Statistical Analysis
Volume number 26
Issue number 1
Start page 63
End page 72
Total pages 10
Publisher University of Salento
Abstract Cox regression model has an important and glaring place in survival analysis. The key assumption is proportional hazards and violation of this assumption can invalidate outcomes of a study. Our approach will be to use Cox regression model with weighted estimation for a survival data set that includes both proportional and nonproportional hazards. We carried out a simulation study, considering different censoring rates, sample sizes, and tied observations. Simulation results are interpreted and discussed with the results obtained by traditional Cox regression model. Cox regression model with N-Prentice weighting function serves as a better model under all simulation scenarios
Subject Biostatistics
Keyword(s) Cox regression model
hazard ratio
log-rank test
nonproportional hazards
survival analysis
weighting function
DOI - identifier 10.1285/i20705948v7n1p26
Copyright notice © Universit`a del Salento
ISSN 2070-5948
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