Table 3.
Unstandardized Path and Moderation Estimates for the Full and Best-Fitting Moderation Models.
| Path |
Linear Moderation Estimates |
Quadratic Moderation Estimates |
|||||||
|---|---|---|---|---|---|---|---|---|---|
| Model | a | c | e | β X | β Y | β Z | β X 2 | β Y 2 | β Z 2 |
| Initial Moderation Analyses | |||||||||
| Full Moderation (Quadratic and Linear) | −.05 (−.48, .41) | .33 (−.51, .51) | −.94 (−1.04, −.84) | −.52 (−.93, −.11) | −.21 (−.70, .69) | .15 (.01, .28) | .09 (.01, .18) | .03 (−.17, .17) | −.02 (−.05, .01) |
| Drop Quadratic C & E Moderation | −.07 (−.39, .51) | .35 (−.51, .51) | −.92 (−1.01, −.84) | .56 (.08, .89) | −.11 (−.22, .22) | .08 (.05, .11) | −.09 (−.16, −.01) | -- | -- |
| Post-Hoc Moderation Analyses | |||||||||
| Separating Mid-to-Late Puberty and Post-Puberty Groups | |||||||||
| Full Moderation (Quadratic and Linear) | −.04 (−.48, .42) | .35 (−.52, .52) | −.92 (−1.02, −.84) | −.44 (−.75, −.11) | −.19 (−.55, .27) | .08 (−.02, .19) | .07 (.01, .12) | .02 (−.07, .11) | −.001 (−.02, .02) |
| Drop Quadratic C & E Moderation | .05 (−.48, .36) | −.34 (−.50, .50) | .93 (.85, 1.01) | −.49 (−.73, −.13) | .09 (−.04, .18) | −.08 (−.10, −.05) | .07 (.02, .11) | -- | -- |
| Removal of Adrenarcheal Twins Ages 6-7 | |||||||||
| Full Moderation (Quadratic and Linear) | .31 (−.52, .67) | .41 (−.63, .63) | −.81 (−.93, −.70) | −1.22 (−1.71, −.13) | −.61 (−1.26, 1.26) | .11 (−.14, .31) | .31 (.02, .47) | .19 (−.39, .39) | −.01 (−.08, .06) |
| Drop Quadratic C & E Moderation | .40 (−.38, .67) | .35 (−.58, .58) | .80 (.70, .90) | −1.24 (−1.64, −.46) | −.14 (−.33, .33) | −.07 (−.11, −.01) | .30 (.12, .43) | -- | -- |
Note. a = genetic path estimate; c = shared environmental path estimate; e = non-shared environmental path estimate; βX = linear moderation estimate of the genetic path estimate; βY = linear moderation estimate of shared environmental path estimate; βZ =linear moderation estimate of the non-shared environmental path estimates; βX2= quadratic moderation estimate of the genetic path estimate; βY2= quadratic moderation estimate of the shared environmental path estimate; βZ2= quadratic moderation estimate of the non-shared environmental path estimate. Estimates are followed by 95% confidence intervals in parentheses, and confidence intervals that do not overlap with zero indicate statistical significance at p <.05. Significant estimates are noted in bold text. The ‘Drop quadratic C and E moderation model’ was best-fitting in the initial moderation analyses and the post-hoc analyses. Since the lowest level of the moderator was coded as 0 in all models, the genetic and environmental contributions to disordered eating at this level can be obtained by squaring the path estimates (i.e., a, c, and e). For each subsequent level, linear (i.e., βX, βY, βZ) and non-linear (i.e., βX2, βY2, ζZ2) moderators were added to the genetic and environmental paths using the following equation: unstandardized variance total = (a + βX(moderator) + βX2(moderator2))2 + (c + βY(moderator) + βY2(moderator2))2 + (e + βZ(moderator) + βZ2(moderator2))2. The unstandardized variance estimates for genetic, nonshared, and shared environmental effects were divided by the total unstandardized variance and multiplied by 100 to obtain the standardized estimates, i.e., the proportion of variance in disordered eating accounted for by genetic and environmental effects at each level of the moderator.