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Differentiating developmental outcome between infants with severe disability in research studies: the role of Bayley

Sally Jary1, Grazyna Kmita, Andrew Whitelaw

  • 1School of Clinical Sciences, University of Bristol, Bristol, United Kingdom. sally.jary@bristol.ac.uk

The Journal of Pediatrics
|March 12, 2011
PubMed

Insights

Infants with low Bayley Scales of Infant Development, Second Edition (BSID-II) scores (<50) showed significant functional deficits. Bayley Developmental Quotients (DQs) effectively measured these differences in preterm infants with brain injury.

Area of Science:

  • Neonatal neurology
  • Developmental pediatrics
  • Pediatric neurodevelopmental outcomes

Background:

  • Posthemorrhagic ventricular dilatation is a common complication in preterm infants.
  • Early neurodevelopmental assessment is crucial for identifying functional deficits.

Purpose of the Study:

  • To determine if infants scoring <50 on the Bayley Scales of Infant Development, Second Edition (BSID-II) exhibit distinct functional abilities.
  • To evaluate if Bayley Developmental Quotients (DQs) reflect these functional differences.

Main Methods:

  • Sixty-seven preterm infants (47 male) with posthemorrhagic ventricular dilatation were assessed at 25 months corrected age.
  • The Bayley Scales of Infant Development, Second Edition (BSID-II) and functional ability grading were used.
  • Mental and Motor Bayley DQs were calculated and compared to functional ability.

Main Results:

  • 51% of subjects (n=34) scored <50 on the BSID-II, revealing significant differences in walking, sitting, eating, speaking, and vision.
  • Bayley DQs showed significant differences across disability grades in all domains except hearing for all subjects.

Conclusions:

  • Bayley DQs accurately quantify functional ability across a spectrum of severity in children.
  • Bayley DQs offer a continuous measure for comparing severely delayed children's abilities.
  • Bayley DQs are valuable for future therapeutic trials in infants with brain injury.
Abstract

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