Table 4.

Hierarchical regression model predicting total IQ score and Verbal Comprehension score at 11 years of age.

Steps	Predictors	R 2	B	SE B	β	t	p
IQ total
step 1	SES	0.09	6.91	3.45	0.27	2.00	0.05
	Child’s age		−4.65	7.68	−0.08	−0.61	0.55
step 2	SES	0.17	3.54	3.74	0.14	0.95	0.35
	Child’s age		−1.44	8.42	−0.03	−0.17	0.87
	Group		−0.63	6.1	−0.02	−0.10	0.92
	PERI		−0.97	0.88	−0.22	−1.11	0.27
	PPQ		−0.63	0.79	−0.13	−0.80	0.43
step 3a	SES	0.17	3.57	3.80	0.14	0.94	0.35
	Child’s age		−1.45	8.51	−0.03	−0.17	0.87
	Group		−0.74	6.41	−0.03	−0.12	0.91
	PERI		−0.96	0.90	−0.22	−1.07	0.29
	PPQ		−0.60	0.91	−0.13	−0.66	0.51
	PPQxPERI		−0.01	0.18	−0.01	−0.06	0.95
step 3b	SES	0.24*	3.97	3.62	0.16	1.1	0.28
	Child’s age		−0.60	8.15	−0.01	−0.07	0.94
	Group		−7.32	6.69	−0.25	−1.10	0.28
	PERI		−0.84	0.85	−0.19	−1.00	0.33
	PPQ		3.00	1.90	0.63	1.58	0.12
	PPQxGroup		−4.23	2.03	−0.73	−2.08	0.04
Verbal comprehension
step 1	SES	0.06	5.66	3.28	0.24	1.73	0.09
	Child’s age		−2.70	7.30	−0.05	−0.37	0.71
step 2	SES	0.20	2.51	3.45	0.10	0.73	0.47
	child’s age		2.45	7.77	0.05	0.31	0.75
	Group		−3.93	5.60	−0.14	−0.70	0.49
	PERI		−1.345	0.811	−0.323	−1.659	0.104
	PPQ		0.24	0.73	0.05	0.33	0.75
step 3a	SES	0.21	2.80	3.48	0.12	0.80	0.43
	Child’s age		2.31	7.80	0.04	0.30	0.77
	Group		−5.28	5.88	−0.19	−0.90	0.37
	PERI		−1.24	0.82	−0.30	−1.51	0.14
	PPQ		0.56	0.84	0.12	0.67	0.51
	PPQxPERI		−0.13	0.16	−0.12	−0.79	0.44
step 3b	SES	0.27*	2.91	3.33	0.12	0.87	0.39
	Child’s age		3.24	7.51	0.06	0.43	0.67
	Group		−10.21	6.16	−0.36	−1.66	0.10
	PERI		−1.22	0.79	−0.29	−1.56	0.13
	PPQ		3.64	1.75	0.81	2.08	0.04
	PPQxGroup		−3.97	1.87	−0.73	−2.12	0.04

Note. SES: Socio-Economic Status, PERI: Perinatal Risk Inventory score, PPQ: Perinatal Postraumatic Questionnaire score, *p < 0.05 for R² change.