TABLE 4

Prevalence of Cerebral Palsy According to Gestational Age and Cranial Ultrasound Abnormalities

Gestational Age, wkUltrasound Abnormalities, No. (%)a
NoneIsolated IVHbEchodensities or Ventricular DilationCystic PVL or IPHTotal Sample
24–2646 (10.9)50 (20.0)36 (27.8)36 (41.7)144 (20.8)
27–28161 (7.5)82 (4.9)70 (12.9)24 (58.3)337 (11.6)
29–30317 (4.4)100 (6.0)65 (9.2)26 (61.5)511 (8.2)
31–32714 (3.4)115 (2.4)91 (13.3)20 (61.9)962 (5.4)
  • a Comparison of cerebral palsy rates according gestational age within each group of cranial ultrasound diagnosis yielded the following: no ultrasound abnormalities, P < .05; isolated IVH, P < .05; echodensities or ventricular dilation, P = .09; cystic PVL or IPH, nonsignificant.

  • b Isolated IVH was isolated grade I, II, or III IVH.