Table 4.

Pooled ANCOVA results with externalizing behavior at Wave 3 as outcome

Source	SS	df	MS	F	Sig.	Partial η2	Observed power
Identity grouping	182.88	3	60.96	0.550	0.648	0.022	0.29
Gender	269.65	1	269.65	3.406	0.066†	0.032	0.55
Identity grouping × gender	56.23	3	18.74	0.202	0.895	0.007	0.12
EXT at Wave 2	2933.33	1	2933.33	33.678	0.000***	0.264	0.99
Error	8105.03	‰	–

^‰The R packages ‘miceadds’ and ‘mice’ were used to compute pooled F values and significance levels for each variable in the model. Denominator df (error) varied with each calculation and is approximated by ∞ (large number of degrees of freedom). SS, MS, and partial η² are averaged over the ten imputed data sets.

^***p < .001.

^†p < 0.10.