Table 3. Bayley Scales of Infant Development-III composite scores for study subjects with post-hemorrhagic hydrocephalus across the Hydrocephalus Clinical Research Network.

Bayley Scales of Infant Development-III Subtest	Composite Score
	PHH	PHH	PHH
	IVH Grade III	IVH Grade IV	Total
	n = 16	n = 38	(n = 54)
Cognitive composite score	77.1 (19.15)	65.8 (11.51)	69.2 (14.96)
Language composite score	75.9 (20.23)	67.7 (16.66)	70.0 (17.89) #
Motor composite score	74.9 (21.72)	57.5 (12.48)	62.3 (17.22)#

Of the 54 subjects with PHH, 16 had IVH Grade III prior to PHH, while 38 had IVH Grade IV prior to PHH. The Bayley-III scores shown are for PHH subjects and both IVH subcategories. Three subjects#, respectively, were unable to complete all phases of testing (2 pertaining to IVH Grade III and 1 pertaining to IVH Grade IV). Composites scores are reported as mean (standard deviation). For reference, composite scores in typically developing children are 100 for each domain.