Results of model fitting are presented in Table 1. Dropping the interaction terms on the pathways shared in common by PPD and DV did not result in a significant worsening in the fit of the model, indicating that these components were not moderated by levels of PPD. The best fitting model was one in which there were no interaction terms on any of the common pathways. However, dropping the interaction terms on each of the unique pathways resulted in a significant deterioration in fit when compared with the full model in which all interactions were estimated freely, indicating that PPD does moderate the extent to which these components influence DV. Therefore, the magnitude of genetic, shared environment, and non-shared environment components specific to DV are moderated by levels of PPD.
