Although some moderating effects could be dropped, indicating a non-significant effect, this may be the result of lack of power at the extremes of the moderator, and results from the full model should be presented (Purcell, 2002). Therefore, we present results derived from the full model only (see Table 2). Changes in absolute variance estimates (based on the full model) for the genetic, shared, and non-shared environmental influences on DV with increasing PPD score, along with confidence intervals are presented in Figure 3. The number of participants (N) at each level of PPD is provided on the right-side vertical axes to provide additional information regarding power (i.e. there is lower power at the extremes of PPD, where the N is lower). As seen in Figure 3a, the ADV was highest among adolescents with low PPD, decreased at more common levels of PPD, and increased slightly among adolescents with higher PPD. Figures 3b and 3c show the change in shared environmental (CDV) and non-shared environmental (EDV) variance respectively, as levels of PPD increase. Both shared environmental and non-shared environmental variance increase with increasing PPD
