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Updated: May 15, 2026

Assessment of Child Anthropometry in a Large Epidemiologic Study
Published on: February 2, 2017
Physical growth and cognitive skills in early-life: evidence from a nationally representative US birth cohort
1Dept. of Economics, Finance, Decision Science, & Marketing, University of Houston - Clear Lake, 2700 Bay Area Boulevard, Houston, TX 77058, USA.
Insights
Early childhood growth, measured by length/height, is linked to cognitive development from infancy through school entry. This early growth predicts kindergarten readiness better than later height, especially for girls.
Area of Science:
- Child Development
- Pediatric Health
- Cognitive Science
Background:
- Childhood growth and cognitive development are complex processes.
- Understanding the early relationship between physical growth and cognitive skills is crucial for identifying developmental trajectories.
- Previous research has explored links between nutrition, health, and cognition, but the specific role of linear growth requires further elucidation.
Purpose of the Study:
- To investigate the association between early childhood length/height and cognitive skills across different developmental stages.
- To determine if early growth is a more significant predictor of later cognitive outcomes than attained height.
- To explore potential sex differences in the growth-cognition relationship.
Main Methods:
- Utilized data from the Early Childhood Longitudinal Study--Birth Cohort (ECLS-B), a representative sample of US children.
- Analyzed longitudinal data tracking children from infancy (9 months) through school entry (kindergarten).
- Employed statistical methods to assess the association between length/height and cognitive measures, controlling for birthweight and socioeconomic status.
Main Results:
- A significant positive association between length/height and cognitive skills was observed as early as 9 months of age, persisting through school entry.
- Early growth trajectory emerged as a stronger predictor of kindergarten reading and math abilities compared to attained height at school entry.
- This stronger predictive power of early growth was more pronounced in girls than in boys.
Conclusions:
- Early physical growth is a critical factor influencing cognitive development in children.
- Interventions promoting optimal early growth may have lasting benefits for cognitive outcomes.
- The findings highlight the importance of considering early life as a sensitive period for the development of cognitive abilities, with potential sex-specific nuances.
Abstract:
This paper establishes associations between length/height and cognitive skills in infancy, toddlerhood, and school-entry. The data come from the Early Childhood Longitudinal Study--Birth Cohort (ECLS-B), a representative longitudinal sample of US children born in 2001. A positive association between length/height and cognition is found as early as 9 months and continues through school-entry. These associations are robust to controls for birthweight and economic status. Early growth is also shown to be a stronger predictor of reading and math skills in kindergarten than attained height. Girls exhibit stronger evidence of this latter result than boys. These findings have implications for the interpretation of early life as a critical period for the growth-cognition relationship.
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