Related Experiment Video
Updated: Aug 18, 2026

An R-Based Landscape Validation of a Competing Risk Model
Published on: September 16, 2022
Tree-augmented Cox proportional hazards models
1Department of Statistics and Actuarial Science, University of Central Florida, Orlando, FL 32816, USA. xsu@pegasus.cc.ucf.edu
Abstract:
We study a hybrid model that combines Cox proportional hazards regression with tree-structured modeling. The main idea is to use step functions, provided by a tree structure, to 'augment' Cox (1972) proportional hazards models. The proposed model not only provides a natural assessment of the adequacy of the Cox proportional hazards model but also improves its model fitting without loss of interpretability. Both simulations and an empirical example are provided to illustrate the use of the proposed method.
Related Concept Videos
Survival Tree
Building a Survival Tree
Constructing a survival tree begins...
Parametric Survival Analysis: Weibull and Exponential Methods
Weibull Distribution
The Weibull distribution is a flexible model used in parametric survival analysis. It can handle both increasing and decreasing hazard rates, depending on its shape parameter...
The Mantel-Cox Log-Rank Test
Assumptions of Survival Analysis
Truncation in Survival Analysis
Left truncation occurs when individuals who experienced the event of interest before a certain time are not included in the study. This is often due to a "delayed entry" into the study where only those who survive until a certain entry point are observed.
Introduction To Survival Analysis
The primary goal of survival analysis is to estimate survival time—the time until a...
