A Generalized Log-Normal Model for Grouped Survival Data
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Data
2010-01-01
Autores
Silveira, Liciana V. A. [UNESP]
Colosimo, Enrico A.
Passos, Jose Raimundo de S. [UNESP]
Título da Revista
ISSN da Revista
Título de Volume
Editor
Taylor & Francis Inc
Resumo
It is common to have experiments in which it is not possible to observe the exact lifetimes but only the interval where they occur. This sort of data presents a high number of ties and it is called grouped or interval-censored survival data. Regression methods for grouped data are available in the statistical literature. The regression structure considers modeling the probability of a subject's survival past a visit time conditional on his survival at the previous visit. Two approaches are presented: assuming that lifetimes come from (1) a continuous proportional hazards model and (2) a logistic model. However, there may be situations in which none of the models are adequate for a particular data set. This article proposes the generalized log-normal model as an alternative model for discrete survival data. This model was introduced by Chen (1995) and it is extended in this article for grouped survival data. A real example related to a Chagas disease illustrates the proposed model.
Descrição
Palavras-chave
Discrete models, Interval censoring, Logistic model, Proportional hazards model
Como citar
Communications In Statistics-theory and Methods. Philadelphia: Taylor & Francis Inc, v. 39, n. 15, p. 2659-2666, 2010.