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. Author manuscript; available in PMC: 2022 Sep 12.

Published in final edited form as: Infancy. 2006 Nov;10(3):267–288.

TABLE 3.

Group Differences for Infant Characteristics

	Nonexposure^a		Prenatal Exposure^b
Variables	M	SD	M	SD	F	$η_{p}^{2}$
Infant characteristics
Age at 2- to 4-week visit (weeks)	3.14	1.10	3.22	.77	.14	.02
Gestational age (weeks)	39.45	1.29	38.67	1.52	5.27^*	.003
Birth weight (g)	3458.63	523.66	3111.53	438.48	8.48^**	.22
Birth length (cm)	49.77	4.70	48.21	6.16	1.35	.005
Birth head circumference (cm)	33.80	1.43	33.79	1.81	.002	.02
Apgar—1 min	8.59	1.21	8.41	1.37	.36	.01
Apgar—5 min	8.95	.22	8.97	.18	.17	.02
Weight at 1 month of age (g)	4588.44	712.94	4007.95	778.54	12.57^**	.24
Length at 1 month of age (cm)	52.16	4.72	52.33	3.39	.03	.02
Head circumference 1 month (cm)	36.82	2.02	36.41	1.66	1.12	.04
Sex (% male)	48%		53%

^a

n = 41.

^b

n = 43.

^*

p < .05.

^**

p < .01.