. Author manuscript; available in PMC: 2011 May 1.

Published in final edited form as: J Abnorm Child Psychol. 2010 May;38(4):459–470. doi: 10.1007/s10802-009-9383-4

Table 5.

Hierarchical Regression Analyses: Predicting Behavior Problem T scores in the PSD Group from Age at Assessment × Age at Adoption

Predictor	Internalizing		Externalizing		Attention		Social		Thought

	β	ΔR²	β	ΔR²	β	ΔR²	β	ΔR²	β	ΔR²
1 Age at assessment^a	0.10	0.01⁺	0.06	0.00	0.11	0.01^*	0.22	0.05^***	0.09	0.01
2 Age at adoption^b	0.22	0.05^***	0.16	0.02^**	0.19	0.03^**	0.27	0.07^***	0.11	0.01^*
3 Age at assessment × age at adoption	0.15	0.00	0.36	0.01^*	0.33	0.01⁺	0.60	0.03^***	0.24	0.01

categorical variable (6–11, 12–18 years)

categorical variable (<, ≥18 months)

⁺

p<0.10

p<0.05

^**

p<0.01

^***

p<0.001