Figure 1.

Multiple mediator model. X: predictor variable; Y: outcome variable; Mi: mediator variable; ai: association between predictor (X) and potential mediator (Mi); bi: association between potential mediator (Mi) and outcome variable (Y); c: overall association between predictor variable (X) and outcome variable (Y); c’: direct effect (unmediated) of predictor variable (X) on outcome variable (Y).

Fernández-Alvira et al. International Journal of Behavioral Nutrition and Physical Activity 2013 10:80   doi:10.1186/1479-5868-10-80
Download authors' original image