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Lifetime Data Analysis

, Volume 24, Issue 1, pp 45–71 | Cite as

Conditional screening for ultra-high dimensional covariates with survival outcomes

  • Hyokyoung G. Hong
  • Jian KangEmail author
  • Yi Li
Article

Abstract

Identifying important biomarkers that are predictive for cancer patients’ prognosis is key in gaining better insights into the biological influences on the disease and has become a critical component of precision medicine. The emergence of large-scale biomedical survival studies, which typically involve excessive number of biomarkers, has brought high demand in designing efficient screening tools for selecting predictive biomarkers. The vast amount of biomarkers defies any existing variable selection methods via regularization. The recently developed variable screening methods, though powerful in many practical setting, fail to incorporate prior information on the importance of each biomarker and are less powerful in detecting marginally weak while jointly important signals. We propose a new conditional screening method for survival outcome data by computing the marginal contribution of each biomarker given priorily known biological information. This is based on the premise that some biomarkers are known to be associated with disease outcomes a priori. Our method possesses sure screening properties and a vanishing false selection rate. The utility of the proposal is further confirmed with extensive simulation studies and analysis of a diffuse large B-cell lymphoma dataset. We are pleased to dedicate this work to Jack Kalbfleisch, who has made instrumental contributions to the development of modern methods of analyzing survival data.

Keywords

Conditional screening Cox model Diffuse large B-cell lymphoma High-dimensional variable screening 

Notes

Acknowledgements

This research was partially supported by a grant from NSA (H98230-15-1-0260, Hong), an NIH grant (R01MH105561, Kang) and Chinese Natural Science Foundation (11528102, Li).

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Copyright information

© Springer Science+Business Media New York 2016

Authors and Affiliations

  1. 1.Michigan State UniversityEast LansingUSA
  2. 2.University of MichiganAnn ArborUSA

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