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Pediatr Obes. 2017 Jul 6. doi: 10.1111/ijpo.12227. [Epub ahead of print]

Associations between birthweight and overweight and obesity in school-age children.

Author information

1
Department of Pediatrics, University of Virginia, Charlottesville, VA, USA.
2
Department of Health Outcomes and Policy, College of Medicine, University of Florida, Gainesville, FL, USA.

Abstract

BACKGROUND:

Relationships between birthweight and future obesity risk remain unclear.

OBJECTIVE:

To assess associations between birthweight and later obesity in a nationally representative cohort of early school-aged children.

METHODS:

We used linear and logistic regression to evaluate 10 186 term- or preterm children in the Early Childhood Longitudinal Study-Kindergarten Cohort 2011 for relationships between birthweight and later obesity and change in BMI z-score from kindergarten-to-second grade. All analyses were adjusted for sex, race/ethnicity, parental education and household income.

RESULTS:

Compared to children born normal birthweight (NBW), high birthweight (HBW) term children and large-for-gestational-age (LGA) preterm children had significantly greater BMI z-scores from kindergarten-to-second grade (p < 0.001). Term children born HBW had higher odds of obesity by kindergarten (adjusted odds ratios [aOR] 1.91, p < 0.0001). Among preterm children, odds of obesity was higher among LGA children starting in first grade (aOR 2.34, p < 0.05) and among small-for-gestational age children in second grade (aOR 2.26, p < 0.05). Compared to NBW children, HBW children had greater change in BMI z-score between kindergarten-first grade (p < 0.01).

CONCLUSIONS:

High birthweight term and LGA preterm children had increased adjusted odds of obesity in school-age compared to their NBW counterparts. Physicians may provide counselling early in life for families of large infants to help prevent future obesity.

KEYWORDS:

Birthweight; childhood; large-for-gestational age; obesity; small-for-gestational age

PMID:
28685963
DOI:
10.1111/ijpo.12227
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