Be Kind, Please PH-Stratify: Duration Models, Stratified Hazards, and Proportional Hazard Testing

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Brief Overview

Testing for violations of the proportional hazards assumption is common in Cox models. Less well understood is that in the context of stratification (common in competing risk and repeated event models) standard tests of this assumption are incorrect.

Authors

• Shawna K. Metzger, National University of Singapore

• Benjamin Jones, University of Mississippi