Results 191 to 200 of about 487,906 (252)

Model inconsistency, illustrated by the cox proportional hazards model

Statistics in Medicine, 1995
AbstractWe consider problems involving the comparison of two or more treatments where we have the opportunity to adjust for relevant covariates either conditionally in a regression model or implicitly in repeated measures data, for example, in crossover trials. It is seen that for data arising from non‐Normal distributions there is the possibility that
I, Ford, J, Norrie, S, Ahmadi
openaire   +2 more sources

Comparing two crossing hazard rates by Cox proportional hazards modelling

Statistics in Medicine, 2006
AbstractMotivated by a clinical trial of zinc nasal spray for the treatment of the common cold, we consider the problem of comparing two crossing hazard rates. A comprehensive review of the existing methods for dealing with the crossing hazard rates problem is provided.
Kejian, Liu, Peihua, Qiu, Jun, Sheng
openaire   +2 more sources

Survival Analysis Cox’s Proportional Hazards Model)

2001
Abstract The San Francisco Men’s Health Study is based on a sample of 1034 single men ages 24 to 54 years. These men were recruited using a multistage prob­ ability sample and were followed from July 1984 to December 1987. Mem­ bers of the cohort were interviewed and examined every six months.
openaire   +1 more source

Mediation analysis with causally ordered mediators using Cox proportional hazards model

Statistics in Medicine, 2018
Causal mediation analysis aims to investigate the mechanism linking an exposure and an outcome. However, studies regarding mediation effects on survival outcomes are limited, particularly in multi‐mediator settings.
Shu-Hsien Cho, Yen-Tsung Huang
semanticscholar   +1 more source

Assessment of local influence on Cox’s proportional hazards model

Acta Mathematicae Applicatae Sinica, 1998
zbMATH Open Web Interface contents unavailable due to conflicting licenses.
Jiang, Jiancheng, Wu, Xizhi
openaire   +2 more sources

Fifty Years with the Cox Proportional Hazards Regression Model

Journal of the Indian Institute of Science, 2022
zbMATH Open Web Interface contents unavailable due to conflicting licenses.
openaire   +3 more sources

Adjusted variable plots for Cox's proportional hazards regression model

Lifetime Data Analysis, 1996
Adjusted variable plots are useful in linear regression for outlier detection and for qualitative evaluation of the fit of a model. In this paper, we extend adjusted variable plots to Cox's proportional hazards model for possibly censored survival data.
Hall, Charles B., Zeger, Scott L., Bandeen-Roche, Karen J.   +2 more
openaire   +2 more sources

Fitting Cox's proportional hazards models from survey data

Biometrika, 1992
SUMMARY The proportional hazards model makes a number of assumptions which may not always be completely satisfied. However, fitting such models can have both descriptive and analytical value. We discuss the implications of the survey design for large-scale studies.
openaire   +1 more source

Exclusive Hypothesis Testing for Cox’s Proportional Hazards Model

Journal of Systems Science and Complexity
zbMATH Open Web Interface contents unavailable due to conflicting licenses.
Wu, Qiang, Tong, Xingwei, Duan, Xiaogang
openaire   +1 more source

Transient effects in the cox proportional hazards regression model

Statistics in Medicine, 1995
AbstractWe consider a model for mortality rates that includes both the long and short term effects of switching from an initial to a second state, for example, when patients receive an initial treatment and then switch to a second treatment. We include transient effects associated with the switch in the model through the use of time‐dependent ...
E A, Mauger, R A, Wolfe, F K, Port
openaire   +2 more sources