Document Type
Article
Original Publication Date
2015
Journal/Book/Conference Title
Cancer Informatics
Volume
2015
Issue
S2
DOI of Original Publication
10.4137/CIN.S17277
Date of Submission
December 2015
Abstract
The pathological description of the stage of a tumor is an important clinical designation and is considered, like many other forms of biomedical data, an ordinal outcome. Currently, statistical methods for predicting an ordinal outcome using clinical, demographic, and high-dimensional correlated features are lacking. In this paper, we propose a method that fits an ordinal response model to predict an ordinal outcome for high-dimensional covariate spaces. Our method penalizes some covariates (high-throughput genomic features) without penalizing others (such as demographic and/or clinical covariates). We demonstrate the application of our method to predict the stage of breast cancer. In our model, breast cancer subtype is a nonpenalized predictor, and CpG site methylation values from the Illumina Human Methylation 450K assay are penalized predictors. The method has been made available in the ordinalgmifs package in the R programming environment.
Rights
Copyright © 2015 the author(s), publisher and licensee Libertas Academica Ltd. This is an open access article published under the Creative Commons CC-BY-NC 3.0 license.
Is Part Of
VCU Biostatistics Publications
Comments
Originally published at http://dx.doi.org/10.4137/CIN.S17277