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Table 1: Sample characteristics of the 2 groups
Characteristics Exposed Group (7 F/ 7 M) Control Group (5 F/ 9 M)
Mean SD Range Mean SD Range
Age at scanning^a 11.3 1.7 8.6–13.9 9.8 0.3 9.0–10.2
Birth weight (g)^a 2999 680 2015–4300 3864 426 3100–4615
Birth length (cm)^a^,^b 47.6 3.0 44–52 51.5 1.4 49–54
Birth head circumference^a 34.1 2.0 31.0–37.0 36.1 1.1 34.0–38.0
Gestational age (weeks)^a 38.1 2.7 31–40 40.7 1.1 39–42
Abstinences at birth^c 2.1 1.1 0–3 – – –
SES 3.9 0.7 2.5–5.0 4.1 0.9 2.5–5.0
McCarthy GCI, 4 years 108.4 15.3 87–136 116.1 9.4 100–128
McCarthy PPS,^a 4 years 50.9 9.3 39–64 62.9 8.4 49–78
WISC-R IQ,^a^,^d 9 years 98.9 9.8 84–117 114.4 14.9 93–145
FFD^a^,^e 27.6 4.8 17–34 34.9 4.9 24–40
a Significant differences across groups (1-way ANOVA).
b Obtained for 12 substance-exposed children and 13 controls.
c At a rating scale where 0 = none, 1 = mild, 2 = moderate, and 3 = severe.
d WISC-R scores were obtained for 13 substance-exposed children and all controls. As seen, the scores of the exposed children are close to population mean. These scores are based on norms from 1974, and the normed scores here are likely elevated compared with present norms. The same is true for the McCarthy scores, which are based on norms from 1973.
e From the WISC-R.

Characteristics	Exposed Group (7 F/ 7 M)			Control Group (5 F/ 9 M)
Characteristics	Mean	SD	Range	Mean	SD	Range
Age at scanning^a	11.3	1.7	8.6–13.9	9.8	0.3	9.0–10.2
Birth weight (g)^a	2999	680	2015–4300	3864	426	3100–4615
Birth length (cm)^a^,^b	47.6	3.0	44–52	51.5	1.4	49–54
Birth head circumference^a	34.1	2.0	31.0–37.0	36.1	1.1	34.0–38.0
Gestational age (weeks)^a	38.1	2.7	31–40	40.7	1.1	39–42
Abstinences at birth^c	2.1	1.1	0–3	–	–	–
SES	3.9	0.7	2.5–5.0	4.1	0.9	2.5–5.0
McCarthy GCI, 4 years	108.4	15.3	87–136	116.1	9.4	100–128
McCarthy PPS,^a 4 years	50.9	9.3	39–64	62.9	8.4	49–78
WISC-R IQ,^a^,^d 9 years	98.9	9.8	84–117	114.4	14.9	93–145
FFD^a^,^e	27.6	4.8	17–34	34.9	4.9	24–40