TABLE 1.

Summary Characteristics of Subjects in Each of the Six Groups^a,^b

	Sample Size (n)	PMA Birth (wk)	Birthweight (g)	PMA Sample (wk)	Age of Sample (wk)	FOR
Control	33	29.7 ± 3.8	1539 ± 809.6	33.7 ± 4.3	4.0 ± 3.5	0.41 ± 0.04
IVH I-II	13	30.9 ± 4.5	1714 ± 795.2	33.0 ± 3.6	2.1 ± 2.4	0.41 ± 0.03
IVH III-IV	12	28.8 ± 5.9	1448 ± 921.1	34.8 ± 6.7	6.1 ± 5.0	0.50 ± 0.04
PHH	12	27.0 ± 3.2	1031 ± 430.5	29.5 ± 2.8	2.6 ± 1.4	0.64 ± 0.03
VEWOH	10	35.3 ± 4.6	2397 ± 1274.7	39.7 ± 5.0	4.4 ± 4.1	0.49 ± 0.08
HIE	13	37.6 ± 2.4	3023 ± 587.7	39.3 ± 2.9	1.8 ± 2.2	0.36 ± 0.03

^aPMA, postmenstrual age; FOR, frontal-occipital ratio, a measure of ventricular size; IVH, intraventricular hemorrhage; PHH, posthemorrhagic hydrocephalus; VEWOH, ventricular enlargement without hydrocephalus; HIE, hypoxic-ischemic encephalopathy.

^bValues are shown as mean ± standard deviation.