The Parametric g-Formula for Time-to-event Data

The parametric g-formula can be used to estimate the effect of a policy, intervention, or treatment. Unlike standard regression approaches, the parametric g-formula can be used to adjust for time-varying confounders that are affected by prior exposures. To date, there are few published examples in which the method has been applied.We provide a simple introduction to the parametric g-formula and illustrate its application in an analysis of a...