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Effects of early intervention on cognitive function of low birth weight preterm infants
J Brooks-Gunn1, F R Liaw, P K Klebanov
1Center for the Study of Children and Families, Columbia University Teachers College, New York, New York.
Insights
Early educational and family support services significantly improved cognitive development in low birth weight preterm infants. Gains were most pronounced in receptive language and visual-motor skills by age 36 months.
Area of Science:
- Pediatrics
- Developmental Psychology
- Public Health
Background:
- Low birth weight preterm infants are at high risk for developmental delays.
- Targeted interventions are crucial for improving long-term cognitive outcomes.
- The Infant Health and Development Program (IHDP) aimed to mitigate these risks.
Purpose of the Study:
- To evaluate the efficacy of the IHDP in reducing developmental delay.
- To identify specific cognitive domains benefiting most from the intervention.
- To analyze intervention effects on visual-motor, spatial, and receptive language skills.
Main Methods:
- Randomized clinical trial involving 985 low birth weight preterm infants across eight sites.
- Intervention included educational, family support, and pediatric follow-up services for the first 3 years.
- Cognitive functioning assessed using Bayley Scales, Stanford-Binet, PPVT, and Beery VMI via factor analysis.
Main Results:
- Intervention demonstrated benefits across multiple cognitive domains at 24 and 36 months.
- The most significant improvements were observed in receptive language and visual-motor/spatial skills.
- These findings align with hypotheses regarding targeted developmental areas.
Conclusions:
- The IHDP effectively enhanced cognitive development in at-risk infants.
- Early, comprehensive interventions can positively impact crucial skill development.
- Targeted support for receptive language and visual-motor skills is particularly beneficial.
Abstract:
The Infant Health and Development Program is a randomized clinical trial to test the efficacy of educational and family support services and pediatric follow-up, offered during the first 3 years of life, in reducing the incidence of developmental delay in low birth weight preterm infants at eight clinical sites (N = 985). It was hypothesized that larger intervention effects would be found for the domains in which low birth weight preterm infants are known to have problems, specifically visual-motor and spatial skills and receptive language skills. These analyses explore the effects of the Infant Health and Development Program on different domains of cognitive functioning. Cognitive domains are identified by means of factor analysis of the intelligence tests used at 12, 24, and 36 months (Bayley Scales of Infant Development (including the Mental and Motor scales) at 12 and 24 months; the Stanford-Binet, Peabody Picture Vocabulary Test, and Beery Test of Visual Motor Intergration at 36 months). Our results reveal that, although intervention benefits accrue across cognitive domains at 24 and 36 months, gains are most pronounced for receptive language and visual-motor and spatial skills.