Seminário
PIPGEs - UFSCar/USP ? 27/09/2013 - 14h00
LOCAL:
Auditório
Prof. Luiz Antonio Fávaro ? Bloco 4 ? ICMC-USP
TÍTULO: Piecewise exponential
model: a flexible and attractive alternative for parametric models in survival
analysis
PALESTRANTE: Fábio Nogueira
Demarqui - UFMG
RESUMO:
The
piecewise exponential model (PEM) is one of the most popular and useful models
in reliability and survival analysis. Although parametric in a strict sense, the
PEM has an strong nonparametric appeal as it provides good approximations to
many continuous distributions and, in prac tical situations, can describe
accordingly hazard functions of several shapes, bringing great flexibility in
survival data modeling. For this reason, the PEM arises as a quite attractive
alternative to parametric survival models, and has been widely used in the
literature on survival analysis. In this talk we present, through the analysis
real data sets, some Bayesian approaches that we have proposed to fit
proportional hazard and cure rate models using the PEM. As we advocate that the
PEM is a flexible and atractive alternative to parametric survival models, for
comparison purposes we also analyze the same data sets with the corresponding
Weibull models, and draw some conclusions regarding the advantages and
disadvantages of each approach.
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