Results 21 to 30 of about 304,906 (296)

Particle Swarm Optimization for Penalize cox models in long-term prediction of breast cancer data

open access: yesIraqi Journal for Computer Science and Mathematics, 2023
The particle swarm optimization algorithm (PSO) was applied to penalize the Cox model for predicting long-term outcomes of breast cancer patients.
Ehab Abbas, Basad Al-Sarray
doaj   +1 more source

Testing and interpreting assumptions of COX regression analysis

open access: yesCancer Research, Statistics, and Treatment, 2019
The COX regression analysis is like any statistical test that is based on multiple assumptions. This is a guide for how to test the assumptions and how to interpret the results.
Sampada Dessai, Vijay Patil
doaj   +1 more source

FAKTOR-FAKTOR YANG MEMPENGARUHI DAYA TAHAN MAHASISWA TEKNIK SIPIL UIB DALAM MEMPERTAHANKAN STUDINYA

open access: yesE-Jurnal Matematika, 2021
Linear regression model cannot be used to analyze the relationship between survival time and independent variables, it is because the linear regression model is not able to handle censored data.
MAHFUZ HUDORI
doaj   +1 more source

A Federated Cox Model with Non-proportional Hazards

open access: yes, 2022
Recent research has shown the potential for neural networks to improve upon classical survival models such as the Cox model, which is widely used in clinical practice. Neural networks, however, typically rely on data that are centrally available, whereas healthcare data are frequently held in secure silos.
D. Kai Zhang   +2 more
openaire   +3 more sources

A mixed model approach for structured hazard regression [PDF]

open access: yes, 2004
The classical Cox proportional hazards model is a benchmark approach to analyze continuous survival times in the presence of covariate information. In a number of applications, there is a need to relax one or more of its inherent assumptions, such as ...
Fahrmeir, Ludwig, Kneib, Thomas
core   +4 more sources

An exact corrected log-likelihood function for Cox's proportional hazards model under measurement error and some extensions [PDF]

open access: yes, 2002
This paper studies Cox`s proportional hazards model under covariate measurement error. Nakamura`s (1990) methodology of corrected log-likelihood will be applied to the so called Breslow likelihood, which is, in the absence of measurement error ...
Augustin, Thomas
core   +1 more source

Cox regression survival analysis with compositional covariates: application to modelling mortality risk from 24-h physical activity patterns [PDF]

open access: yes, 2020
Survival analysis is commonly conducted in medical and public health research to assess the association of an exposure or intervention with a hard end outcome such as mortality. The Cox (proportional hazards) regression model is probably the most popular
Chastin, S.F.M.   +4 more
core   +1 more source

Statistical models for the analysis of skewed healthcare cost data: A simulation study [PDF]

open access: yes, 2015
Skewed data is the main issue in statistical models in healthcare costs. Data transformation is a conventional method to decrease skewness, but there are some disadvantages.
Angali, Kambiz Ahmadi   +2 more
core   +1 more source

Effects of Collinearity on Cox Proportional Hazard Model with Time Dependent Coefficients: A Simulation Study

open access: yesJournal of Biostatistics and Epidemiology, 2020
Background: The Cox proportional hazard model has gained ground in Biostatistics and other related fields. It has been extended to capture different scenarios, part of which are violation of the proportionality of the hazards, presence of time dependent ...
Bayowa Teniola Babalola   +1 more
doaj   +1 more source

The trend of change in cervical tumor size and time to death of hospitalized patients in northwestern Ethiopia during 2018–2022: Retrospective study design

open access: yesHealth Science Reports, 2023
Background and Aims Cervical cancer is the fourth most common cause of cancer‐related death in the world. The objective of this study was to determine factors that affect the longitudinal change of tumor size and the time to death of outpat Methods A ...
Aragaw E. Aguade   +2 more
doaj   +1 more source

Home - About - Disclaimer - Privacy