Can CAUSALMED procedure handle more than one mediator variables?

[joe66]

Hi , I got one mediator variable that has three levels, such as "difficult" , "medium" and "easy", I know CAUSALMED can handle binary or continuous mediators, however I am not sure if I can include two binary mediators in the model by creating two dummy variables for "medium" and "easy"?

Is there any way I can apply this three level categorical mediator?

Thanks,

Robin

[StatDave]

The methodology that CAUSALMED employs does not allow for more than one mediator. However, see the second example in this note. 

[joe66]

Thanks for reply. The example involve two mediators, but I noticed that it does not include bootstrapping as Causalmed, how could I include bootstrapping in this method?

Robin

[tamhane]

Refer to this paper: "Mediation Analysis Allowing for Exposure–Mediator Interactions and Causal Interpretation: Theoretical Assumptions and Implementation With SAS and SPSS Macros" by Valeri and VanderWeele.