Discrete and continuous bivariate lifetime models in presence of cure rate: a comparative study under Bayesian approach

Ricardo Puziol de Oliveira, Jorge Alberto Achcar, Danielle Peralta and Josmar Mazucheli

Journal of Applied Statistics, 2019, vol. 46, issue 3, 449-467

Abstract: The modeling and analysis of lifetime data in which the main endpoints are the times when an event of interest occurs is of great interest in medical studies. In these studies, it is common that two or more lifetimes associated with the same unit such as the times to deterioration levels or the times to reaction to a treatment in pairs of organs like lungs, kidneys, eyes or ears. In medical applications, it is also possible that a cure rate is present and needed to be modeled with lifetime data with long-term survivors. This paper presented a comparative study under a Bayesian approach among some existing continuous and discrete bivariate distributions such as the bivariate exponential distributions and the bivariate geometric distributions in presence of cure rate, censored data and covariates. In presence of lifetimes related to cured patients, it is assumed standard mixture cure rate models in the data analysis. The posterior summaries of interest are obtained using Markov Chain Monte Carlo methods. To illustrate the proposed methodology two real medical data sets are considered.

Date: 2019
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DOI: 10.1080/02664763.2018.1495701

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