Fig. 2
From: The association between population density and blood lipid levels in Dutch blood donors
Mediation analysis framework. c path total effect of population density on blood lipid levels, c′ path direct effect of population density on blood lipids adjusted for mediating variable, a-path effect of population density on mediator, b-path effect of mediator on blood lipids, a-path × b-path indirect effect of population density on blood lipid levels through mediating variables