Evaluating preterm infants with the Bayley-III: patterns and correlates of development

Res Dev Disabil. 2012 Nov-Dec;33(6):1948-56. doi: 10.1016/j.ridd.2012.05.024. Epub 2012 Jun 26.


This study investigates the Third Edition of the Bayley Scales of Infant and Toddler Development (Bayley-III) and: (1) early patterns of neurodevelopmental performance among preterm infants 8-12 months of age; and (2) correlations between known risk factors and neurodevelopmental outcome of preterm infants in this cohort. Mean Language Index (LI; 91±15) and Motor Index (MI; 94±17) were significantly lower than the Cognitive Index (CI; 102±15, p<.01). For the majority (53%) of infants, language development was their weakest domain; for another 39%, motor skills were the weakest area of development. Almost one-quarter (22%) of this cohort had mildly delayed language and motor skills, while 7% had significantly delayed language and motor skills. Regression models revealed severely abnormal head ultrasound significantly predicted MI, LI, and CI. Oxygen dependence at discharge predicted CI, LI, and race/ethnicity predicted LI, MI. Results support the addition of the Language Index to the newly revised Bayley-III Scales. Prediction models of developmental performance confirm known neonatal risk factors and reveal sociodemographic risk factors that call for additional research.

MeSH terms

  • Cognition Disorders / diagnosis*
  • Cognition Disorders / psychology
  • Cohort Studies
  • Developmental Disabilities / diagnosis*
  • Developmental Disabilities / psychology
  • Female
  • Follow-Up Studies
  • Humans
  • Infant
  • Infant, Newborn
  • Infant, Premature, Diseases / diagnosis*
  • Infant, Premature, Diseases / psychology
  • Language Development Disorders / diagnosis*
  • Language Development Disorders / psychology
  • Male
  • Motor Skills Disorders / diagnosis*
  • Motor Skills Disorders / psychology
  • Neuropsychological Tests / statistics & numerical data*
  • Psychometrics
  • Retrospective Studies
  • Risk Factors