Published by the Foundation for Open Access Statistics
Editors-in-chief: Bettina Grün, Torsten Hothorn, Edzer Pebesma, Achim Zeileis    ISSN 1548-7660; CODEN JSSOBK
simPH: An R Package for Illustrating Estimates from Cox Proportional Hazard Models Including for Interactive and Nonlinear Effects | Gandrud | Journal of Statistical Software
Authors: Christopher Gandrud
Title: simPH: An R Package for Illustrating Estimates from Cox Proportional Hazard Models Including for Interactive and Nonlinear Effects
Abstract: The R package simPH provides tools for effectively communicating results from Cox proportional hazard (PH) models, including models with interactive and nonlinear effects. The Cox (PH) model is a popular tool for examining event data. However, previously available computational tools have not made it easy to explore and communicate quantities of interest and associated uncertainty estimated from them. This is especially true when the effects are interactions or nonlinear transformations of continuous variables. These transformations are especially useful with Cox PH models because they can be employed to correctly specifying models that would otherwise violate the nonproportional hazards assumption. Package simPH makes it easy to simulate and then plot quantities of interest for a variety of effects estimated from Cox PH models including interactive effects, nonlinear effects, as well as standard linear effects. Package simPH employs visual weighting in order to effectively communicate estimation uncertainty. There are options to show either the standard central interval of the simulation's distribution or the shortest probability interval - which can be useful for asymmetrically distributed estimates. This paper uses hypothetical and empirical examples to illustrate package simPH 's syntax and capabilities.

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Paper: simPH: An R Package for Illustrating Estimates from Cox Proportional Hazard Models Including for Interactive and Nonlinear Effects     Download PDF (Downloads: 2677)
Supplements:
simPH_1.3.1.tar.gz: R source package Download (Downloads: 91; 788KB)
v65i03.R: R example code from the paper Download (Downloads: 97; 4KB)
hmohiv.csv.zip: Example data in CSV format Download (Downloads: 78; 1KB)

DOI: 10.18637/jss.v065.i03

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Paper: Creative Commons Attribution 3.0 Unported License
Code: GNU General Public License (at least one of version 2 or version 3) or a GPL-compatible license.