EDV showed similar patterns to those reported for the full model described above. The ADV was highest among adolescents with low PPD, low among those with moderate PPD and increased among adolescents with high PPD (low PPD: 0.63; moderate PPD: 0.10; high PPD: 0.50). The CDV initially increased from the low to moderate PPD group, but decreased in those with the highest levels of PPD (low PPD: 0.00; moderate PPD: 0.36; high PPD: 0.06). Finally, the EDV showed a general increase with increasing PPD (low PPD: 0.11; moderate PPD: 0.04; high PPD: 0.93). The consistency between this traditional method of testing for moderations and the results described above provide further evidence for a moderating effect of PPD on the variance components for DV as well as demonstrating the robustness of complex model for this type of analysis.
