Buscar
Mostrando ítems 11-20 de 180
Properties and inference for proportional hazard models
(Universidad Nacional de Colombia, 2013)
We consider an arbitrary continuous cumulative distribution functionF(x) with a probability density function f(x) = dF(x)=dx and hazard functionhf (x) = f(x)=[1
A semi-Markov multistate model for estimation of the mean quality-adjusted survival for non-progressive processes
(SPRINGER, 2009)
We discuss the estimation of the expected value of the quality-adjusted survival, based on multistate models. We generalize an earlier work, considering the sojourn times in health states are not identically distributed, ...
Estimation of the mean quality-adjusted survival using a multistate model for the sojourn times
(ELSEVIER SCIENCE BV, 2008)
In clinical trials, it may be of interest taking into account physical and emotional well-being in addition to survival when comparing treatments. Quality-adjusted survival time has the advantage of incorporating information ...
Anemia at one year is an independent risk factor of graft survival
(2012-02-01)
Background Post-transplant anemia is multifactorial and highly prevalent. Some studies have associated anemia with mortality and graft failure. The purpose of this study was to assess whether the presence of anemia at 1 ...
Proportional Hazard Birnbaum-Saunders Distribution With Application to the Survival Data Analysis
(Universidad Nacional de Colombia - Sede Bogotá - Facultad de Ciencias - Departamento de Estadística, 2016-01-01)
Birnbaum and Saunders (1969b) used a probability distribution to explain the lifetime data and stress produced in materials. Based on this distribution, we propose a generalization of the Birnbaum-Saunders distribution, ...
Survival model induced by discrete frailty for modeling of lifetime data with long-term survivors and change-point
(Taylor & Francis Inc, 2019-07-30)
Frailty models are used for modeling heterogeneity in the data analysis of lifetimes. Analysis that ignore frailty when it is present leads to incorrect inferences. In survival analysis, the distribution of frailty is ...
Asymmetric regression models bernoulli/log proportional-hazard distribution
(Universidad Nacional de Colombia, 2014-07-09)
En este artículo se introduce una forma de distribución asimétrica paradatos no-negativos llamada distribución log hazard proporcional (LPHF).Esta nueva distribución es usada para estudiar un modelo de regresión asimétricopara ...