Table 2; online:

Frequencies of different outcomes for infants with variably-defined WMD findings.

Definition of WMD	Number with WMD / Total (%)	No neurodevelopme ntal burden %(N)	Normal cognition with CP, ASD, and/or epilepsy % (N)	Cognitive impairment % (N)
Echolucency OR late ventriculomegaly*	93 / 858 (10.5)	52.7 (49)	17.2 (16)	30.1 (28)
Echolucency OR ventriculomegaly (includes early and late)	123 / 889 (13.8)	44.7 (55)	17.1 (21)	38.2 (47)
Echolucency OR echodensity OR ventriculomegaly (includes early and late)	188 / 889 (21.2)	41.0 (77)	14.9 (28)	44.2 (83)

Abbreviations: ASD- autism spectrum disorder; CP- cerebral palsy; WMD – white matter damage

^*31 infants did not undergo late ultrasound and could not be classified in regard to presence or absence of late ventriculomegaly