On%20Ranking%20in%20Survival%20Analysis:%20Bounds%20on%20the%20Concordance%20Index

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On Ranking in Survival Analysis Bounds on the
Concordance Index
Poster ID M54
Vikas C. Raykar, Harald Steck, Balaji
Krishnapuram, Cary Dehing-Oberije, Philippe
Lambin CAD Knowledge Solutions (IKM CKS),
Siemens Medical Solutions Inc., Malvern, USA
Department of Radiation Oncology (MAASTRO),
GROW-University Maastricht, Netherlands
Medical statistics
Machine learning
Survival Analysis
Ranking
ranking constraints
censored data
AUC / WMW statistic
concordance index

• Proportional Hazard model
• Maximize Coxs partial
• likelihood

• Log-sigmoid lower bound
• Ranking algorithms