Sustained Effects of High Participation in an Early Intervention for Low-Birth-Weight Premature Infants

Jennifer L. Hill, Jeanne Brooks-Gunn, Jane Waldfogel

Research output: Contribution to journalArticle

Abstract

Effects of high participation in the Infant Health and Development Program (IHDP), an 8-site randomized trial that targeted low-birth-weight (LBW) premature infants (N = 1,082), were estimated. Children in the treatment group were offered high-quality center-based care in their 2nd and 3rd years of life (full-day care, 50 weeks per year). High-dosage effects were estimated with a new methodology that found a matched comparison group within the follow-up group for those with high participation rates; these estimates were compared with traditional intention-to-treat (ITT) estimates. At age 8, effects on the Wechsler Intelligence Scale for Children Full and Verbal scales for children who attended > 400 days ranged from 7 to 10 points. For the heavier LBW infants (2,001-2,500 g), the effects were about 14 points for > 400 days; for the lighter LBW infants (≤ 2,000 g), the effects were about 8 points. These effects were all substantially higher than corresponding ITT effects. Similar but smaller effects were found for children who attended > 350 days.

Original languageEnglish (US)
Pages (from-to)730-744
Number of pages15
JournalDevelopmental Psychology
Volume39
Issue number4
DOIs
StatePublished - Jul 2003

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Low Birth Weight Infant
Premature Infants
infant
participation
Wechsler Scales
Child Development
Intelligence
Research Design
day care
Group
intelligence
methodology
Therapeutics
health

ASJC Scopus subject areas

  • Developmental and Educational Psychology

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Sustained Effects of High Participation in an Early Intervention for Low-Birth-Weight Premature Infants. / Hill, Jennifer L.; Brooks-Gunn, Jeanne; Waldfogel, Jane.

In: Developmental Psychology, Vol. 39, No. 4, 07.2003, p. 730-744.

Research output: Contribution to journalArticle

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