Body Composition Changes from Infancy to 4 Years and Associations with Early Childhood Cognition in Preterm and Full-Term Children
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Published on: April 28, 2016
Johannah M Scheurer1, Lei Zhang2, Erin A Plummer1
1Division of Neonatology, Department of Pediatrics, University of Minnesota, Minneapolis, Minnesota, USA.
Insights
Body composition changes in preterm infants are linked to cognitive outcomes. Specific gains in fat-free mass correlate with higher IQ and processing speed, while fat mass gains are associated with cognitive function. These insights may guide growth interventions.
Area of Science:
- Pediatric Health
- Neurodevelopmental Science
- Body Composition Analysis
Background:
- Premature infants face risks of neurodevelopmental complications.
- Early growth is crucial for later cognitive development.
- The link between early body composition and cognitive function in preterm infants requires further investigation.
Purpose of the Study:
- To compare changes in fat-free mass and adiposity between preterm and full-term infants up to preschool age.
- To investigate the association between these body composition changes and early childhood cognition.
Main Methods:
- A prospective observational study included 71 infants (20 preterm, 51 full-term).
- Body composition was measured using air displacement plethysmography at term, 3-4 months corrected age, and 4 years.
- Cognitive function was assessed at 4 years, with analyses using linear regression.
Main Results:
- In preterm infants, increased percent body fat from term to 4 months was linked to lower working memory (p=0.01).
- Higher fat-free mass gains from 4 months to 4 years correlated with better full-scale IQ (p=0.03) and processing speed (p≤0.02).
- In full-term infants, increased fat mass from 4 months to 4 years was associated with lower full-scale IQ (p=0.03).
Conclusions:
- Body composition changes during infancy and early childhood impact different aspects of cognitive function.
- These findings highlight the importance of monitoring body composition for cognitive development in infants.
- The results may inform targeted interventions to optimize growth and neurodevelopmental outcomes.
Background:
Infants born prematurely are at risk for neurodevelopmental complications. Early growth is associated with improved later cognition. The relationship of early proportionality and body composition with later cognition is not well established.
Objectives:
To assess differences in fat-free mass and adiposity (fat mass, percent body fat) changes in preterm and full-term infants through preschool age and examine associations with early childhood cognition.
Methods:
This is a prospective, observational study in an appropriate for gestational age cohort of 71 patients (20 preterm and 51 full-term) from infancy through preschool age. Anthropometric and body composition measurements via air displacement plethysmography were obtained during infancy at term and 3-4 months (preterm corrected ages), and at 4 years. Cognitive testing occurred at 4 years. Associations of body composition changes between visits with cognitive function were tested using linear regression.
Results:
In the preterm group, higher term to 4-month corrected age percent body fat gains were associated with lower working memory performance (p = 0.01), and higher 4-month corrected age to 4-year fat-free mass gains were associated with higher full-scale IQ (p = 0.03) and speed of processing performance (p ≤ 0.02). In the full-term group, higher 4-month to 4-year fat mass gains were associated with lower full-scale IQ (p = 0.03).
Conclusions:
Body composition gains during different time periods are associated with varying areas of cognitive function. These findings may inform interventions aimed at optimal growth.
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