Results 21 to 30 of about 377,632 (286)

Statistical estimation in the proportional hazards model with risk set sampling [PDF]

open access: yes, 2004
Thomas' partial likelihood estimator of regression parameters is widely used in the analysis of nested case-control data with Cox's model. This paper proposes a new estimator of the regression parameters, which is consistent and asymptotically normal ...
Chen, Kani
core   +2 more sources

Simulating time-to-event data under the Cox proportional hazards model: assessing the performance of the non-parametric Flexible Hazards Method

open access: yesFrontiers in Applied Mathematics and Statistics, 2023
Numerous methods and approaches have been developed for generating time-to-event data from the Cox Proportional Hazards (CPH) model; however, they often require specification of a parametric distribution for the baseline hazard even though the CPH model ...
Jennifer L. Delzeit, Devin C. Koestler
doaj   +1 more source

Bayesian Analysis of Masked Competing Risks Data Based on Proportional Subdistribution Hazards Model

open access: yesMathematics, 2022
Masked issues can emerge when dealing with competing risk data. Such issues are exemplified by the cause of a particular failure not being directly exhibited for all units to observe but only proven to be a subset of possible causes of failure.
Yosra Yousif   +3 more
doaj   +1 more source

Bayesian semiparametric inference for multivariate doubly-interval-censored data [PDF]

open access: yes, 2010
Based on a data set obtained in a dental longitudinal study, conducted in Flanders (Belgium), the joint time to caries distribution of permanent first molars was modeled as a function of covariates.
De Iorio, Maria   +3 more
core   +4 more sources

Proportional hazards models with discrete frailty [PDF]

open access: yesLifetime Data Analysis, 2010
We extend proportional hazards frailty models for lifetime data to allow a negative binomial, Poisson, Geometric or other discrete distribution of the frailty variable. This might represent, for example, the unknown number of flaws in an item under test.
Caroni, Chrys   +2 more
openaire   +4 more sources

Comparison of radiomic feature aggregation methods for patients with multiple tumors

open access: yesScientific Reports, 2021
Radiomic feature analysis has been shown to be effective at analyzing diagnostic images to model cancer outcomes. It has not yet been established how to best combine radiomic features in cancer patients with multifocal tumors.
Enoch Chang   +7 more
doaj   +1 more source

Trend-constrained corrected score for proportional hazards model with covariate measurement error

open access: yesContemporary Clinical Trials Communications, 2015
In many medical research studies, survival time is typically the primary outcome of interest. The Cox proportional hazards model is the most popular method to investigate the relationship between covariates and possibly right-censored survival time ...
Ming Zhu, Yijian Huang
doaj   +1 more source

Regression Models for Lifetime Data: An Overview

open access: yesStats, 2022
Two methods dominate the regression analysis of time-to-event data: the accelerated failure time model and the proportional hazards model. Broadly speaking, these predominate in reliability modelling and biomedical applications, respectively.
Chrys Caroni
doaj   +1 more source

Regularization for Cox's proportional hazards model with NP-dimensionality

open access: yes, 2012
High throughput genetic sequencing arrays with thousands of measurements per sample and a great amount of related censored clinical data have increased demanding need for better measurement specific model selection.
Bradic, Jelena   +2 more
core   +1 more source

Explained randomness in proportional hazards models [PDF]

open access: yesStatistics in Medicine, 2005
A coefficient of explained randomness, analogous to explained variation but for non-linear models, was presented by Kent. The construct hinges upon the notion of Kullback-Leibler information gain. Kent and O'Quigley developed these ideas, obtaining simple, multiple and partial coefficients for the situation of proportional hazards regression.
John, O'Quigley   +2 more
openaire   +2 more sources

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