Results 11 to 20 of about 15,550,459 (307)

The Impact of Violation of the Proportional Hazards Assumption on the Calibration of the Cox Proportional Hazards Model

open access: yesEpidemiology, Biostatistics and Public Health
INTRODUCTION The Cox proportional hazards regression model is frequently used to develop clinical prediction models for time-to-event outcomes, allowing clinicians to estimate an individual’s risk of experiencing the outcome within specified time ...
Peter Austin, Daniele Giardiello
doaj   +6 more sources

Extension of Cox Proportional Hazard Model for Estimation of Interrelated Age-Period-Cohort Effects on Cancer Survival

open access: yesCancer Informatics, 2011
In the frame of the Cox proportional hazard (PH) model, a novel two-step procedure for estimating age-period-cohort (APC) effects on the hazard function of death from cancer was developed. In the first step, the procedure estimates the influence of joint
Tengiz Mdzinarishvili   +3 more
doaj   +3 more sources

The impact of violation of the proportional hazards assumption on the discrimination of the Cox proportional hazards model

open access: yesDiagnostic and Prognostic Research
Background The Cox proportional hazards regression model is frequently used to estimate an individual’s probability of experiencing an outcome within a specified prediction horizon. A key assumption of this model is that of proportional hazards.
Peter C. Austin, Daniele Giardiello
doaj   +3 more sources

Estimation in a Cox Proportional Hazards Cure Model [PDF]

open access: yesBiometrics, 2000
Summary.Some failure time data come from a population that consists of some subjects who are susceptible to and others who are nonsusceptible to the event of interest. The data typically have heavy censoring at the end of the follow‐up period, and a standard survival analysis would not always be appropriate.
Sy, Judy P., Taylor, Jeremy M. G.
openaire   +4 more sources

Modeling of Distance Learners’ Retention Using Mixed-Model on Non-Proportional Hazard

open access: yesJournal of Open, Flexible and Distance Learning, 2023
Universitas Terbuka is a public university in Indonesia that implements an open-distance education system. The quality and success of higher education in Indonesia are indicated by the gross enrolment rate (GER).
Dewi Juliah Ratnaningsih
doaj   +3 more sources

The Optimal Machine Learning-Based Missing Data Imputation for the Cox Proportional Hazard Model

open access: yesFrontiers in Public Health, 2021
An adequate imputation of missing data would significantly preserve the statistical power and avoid erroneous conclusions. In the era of big data, machine learning is a great tool to infer the missing values.
Chao-Yu Guo   +4 more
doaj   +1 more source

Evaluation of instrumental variable method using Cox proportional hazard model in epidemiological studies

open access: yesMethodsX, 2023
The instrumental variable (IV) method with a Cox proportional hazard (PH) model has been used to evaluate treatment effects in epidemiological studies involving survival data. The effectiveness of the IV methods in these circumstances has yet to be fully
Md. Jamal Uddin   +2 more
doaj   +1 more source

Analysis of The Debtor's Endurance using Cox Regression Semiparametric Method

open access: yesJurnal Ilmu Keuangan dan Perbankan, 2022
The aim of this research was conducted to determine the factors that influence the resilience of car loan debtors in an area. The research method used is semiparametric Cox regression on secondary data, WAREHOUSE consisting of the customer profile ...
Vitri Aprilla Handayani*   +3 more
doaj   +1 more source

A Federated Cox Model with Non-Proportional Hazards

open access: yesCoRR, 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.
Dekai Zhang   +2 more
openaire   +3 more sources

Predicting completion of clinical trials in pregnant women: Cox proportional hazard and neural network models

open access: yesClinical and Translational Science, 2022
This study aimed to develop a model for predicting the completion of clinical trials involving pregnant women using the Cox proportional hazard model and neural network model (DeepSurv) and to compare the predictive performance of both methods.
Bomee Kim   +6 more
doaj   +1 more source

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