Hélène Jacqmin‐Gadda

Built-in selection bias in proportional hazards models with omitted covariates: Simulation evidence and alternative approaches

In time-to-event analysis, the hazard ratio derived from the Cox proportional hazards model is the most commonly used and widely reported measure for assessing treatment effects. However, hazard ratios are non-collapsible due to their inherent conditioning on survival up to each...