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Bayley-II Mental Developmental Index scores at 9 and 18 months for children under 1000 grams birthweight

Published online by Cambridge University Press:  29 October 2015

J.Anne Dezoete  and
Barton A. MacArthur
J.Anne Dezoete*
Affiliation:
Child Development Unit, National Women’s Hospital
Barton A. MacArthur
Affiliation:
Child Development Unit, National Women’s Hospital
*
Child Development Unit, 1st Floor, National Women’s Hospital, Private Bag 92-189, Auckland New Zealand, Phone: 09-630-9878, Fax: 09-630-9753, E-mail: AnneD@ahsl.co.nz
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Abstract

This study identified selected perinatal and neonatal variables that place ELBW children at particularly high risk for cognitive delay. Forty children weighing less than 1000 grams (ELBW) at birth underwent developmentol assessment at 9 and 18 months on the Bayley II Mental Development lndex (MDI). Decline in MDI scores between these two ages was evident for infants under 26 weeks gestation at birth as well as for children categorised with an impairment (outcome categories I and II). At 9 months, MDI scores were significantly lower for children with chronic lung disease, for those who required formal developmental intervention, and for those hospitalised for respiratory problems. At 18 months, cognitive scores were significantly lower for children on four variables: gestational age less than 26 weeks; semi-skilled, unskilled, unemployed parents (levels 5 and 6); formal intervention; and admission to hospital for respiratory illness. Greater emphasis on intervention for these at-risk variables is recommended.

Keywords

Bayley II Mental Development Indexcognitive delayELBW
Type
Research Article
Information
The Educational and Developmental Psychologist , Volume 16 , Issue 2 , November 1999 , pp. 43 - 51
Copyright
Copyright © Australian Psychological Society 1999

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