Table 3.

Neuropsychological and behavioral test scores at age 7 by maternal IQ and child 7y IQ

	Maternal IQ <70					Maternal IQ≥ 70
	Child 7y IQ<85		Child 7y IQ ≥85		Difference*	Child 7y IQ<85		Child 7y IQ ≥85		Difference*
Neuropsychological and behavioral test at age 7	n	Mean±SD	n	Mean±SD	β ( SE)	n	Mean± SD	n	Mean±SD	β ( SE)
NEPSY
Attention/executive functions	63	75±16	29	94±13	17.7 (3.8)	154	76±13	257	95±15	17.0 (1.4)
CPT d-Prime	56	59±8	28	53±12	−4.7 (2.4)	150	58±10	250	54±10	−3.8 (1.1)
CVLTC
List A memory	68	38±10	32	43±13	5.1 (2.4)	170	40±10	277	47±11	5.9 (1.1)
Learning Slope	68	−0.6±1.1	32	−0.4±1.5	0.2 (0.3)	170	−0.5±1.1	277	−0.3±1.1	0.2 (0.1)
WLPB-R
Broad Reading score	64	83±17	28	99±18	17.3 (4.4)	157	83±16	258	103±15	18.1 (1.6)
CPT Hit response time	56	42±15	28	45±10	3.2 (3.8)	150	41±13	250	44±12	2.5 (1.4)
NESS
Sequential movement time	57	1.1±1.2	28	1.3±1.3	0.2 (0.3)	146	1.4±1.4	250	0.7±1.1	−0.7 (0.1)
BASC-TRS
Adaptive skills	59	41±8	26	48±8	7.1 (2.2)	142	44±8	221	50±10	5.4 (1.1)
Behavioral Symptoms Index	58	60±12	26	51±11	−7.5 (3.3)	146	57±11	227	51±11	−4.9 (1.2)
Externalizing problems	59	61±15	26	53±14	−5.6 (4.1)	146	57±12	228	53±12	−3.2 (1.3)
Internalizing problems	59	54±9	26	51±9	−2.4 (2.7)	146	54±10	228	51±9	−3.2 (1.1)
School problems	58	65±13	26	53±11	−9.9 (3.6)	147	60±12	228	52±11	−7.5 (1.2)
BASC-PRS
Adaptive skills	69	42±11	32	45±13	5.1 (2.9)	169	44±11	278	48±10	3.4 (1.1)
Behavioral Symptoms Index	69	58±15	32	53±13	−3.4 (3.6)	169	58±16	278	54±15	−3.7 (1.6)
Externalizing problems	69	60±17	32	55±12	−3.0 (3.9)	169	62±16	278	56±14	−5.1 (1.5)
Internalizing problems	69	51±14	32	51±10	1.0 (3.2)	169	50±13	278	50±12	0.2 (1.3)

^*Difference is the difference of child 7y IQ ≥ 85 minus child 7y IQ<85, adjusted for clinic center, race, sex, language, parent’s education, parent’s employment, single parent, concurrent blood lead level, and maternal IQ