Table 4.

Sample characteristics

Infant	Cocaine				Non-cocaine		F/χ2a	p
	Heavy (n=82)		Light (n=76)		(n=161)
	M±SD	Range	M±SD	Range	M±SD	Range
Birthweight (g)b	2723±587	(905–3905)	2743±701	(930–3995)	3112±629	(1017–4515)	163.2	0.0001c
Gestational age (weeks)	37.9±3	(29–42)	37.6±3	(28–42)	38.7±2	(30–42)	5.5	0.005c
Birth length (cm)b	47.4±4	(34.5–55)	47.4±4	(34–58)	49.3±3	(37–57)	107.8	0.0001c
Head circumference (cm)b	32.4±2	(24.5–36)	32.3±3	(23–37)	33.6±2	(25–39.5)	101.48	0.0001c
Apgar — 1 min	8.1±1	(1–9)	8.0±2	(2–9)	8.0±2	(1–9)	0.30	0.74
Apgar — 5 min	8.8±0.5	(6–9)	8.8±0.7	(5–9)	8.8±0.6	(5–9)	0.45	0.63
Hobel score	5.2±13		6.9±15		4.1±11		1.31	0.27
Female	42 (51%)		40 (53%)		80 (50%)		0.08	0.77
SGAd	10 (12%)		9 (12%)		2 (1%)		0.14	0.001c
Microcephaly	19 (25%)		21 (28%)		14 (9%)		10.8	0.001c
Non-maternal care	30 (37%)		15 (20%)		1 (<1%)		59.2	0.001e

^aMantel–Haenszel chi-square.

^bp adjusted for gestational age.

^cNone < or > light and heavy.

^dSmall for gestational age.

^eNone < light < heavy.