Tailoring Bayesian Additive Regression Trees (BART) for environmental mixture studies
Fig 2
Average marginal effects for exposures ,
and
, in simulations with 15 exposures and a continuous outcome, using hierarchical variable selection for modified BART with 20 trees and BKMR. The true relationship is a non-linear main effects only model
, with
. Note: All simulations were replicated 500 times. The reference lines are true effects of each exposure by fixing all other exposures at their quartiles.