Non-collapsibility and built-in selection bias of period-specific and conventional hazard ratio in randomized controlled trials

Abstract Background The hazard ratio of the Cox proportional hazards model is widely used in randomized controlled trials to assess treatment effects. However, two properties of the hazard ratio including the non-collapsibility and built-in selection bias need to be further investigated. Methods We...

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Bibliographic Details
Main Authors: Helen Bian, Menglan Pang, Guanbo Wang, Zihang Lu
Format: Article
Language:English
Published: BMC 2024-11-01
Series:BMC Medical Research Methodology
Subjects:
Online Access:https://doi.org/10.1186/s12874-024-02402-3
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