Relation between birth weight and weight and height at the age of 2 in children born preterm

Eunice Kennedy Shriver National Institute of Child Health, Human Development Maternal-Fetal Medicine Units Network

Research output: Contribution to journalArticlepeer-review

1 Scopus citations

Abstract

Objective The aim of the study was to evaluate associations between fetal growth and weight at 2 years in infants born preterm using a customized approach for birth weight. Study Design This is a secondary analysis of a multicenter trial that included a 2-year follow-up of children born prematurely. Customized birth weight percentiles were calculated using the Gardosi model for a U.S. population, and the relation between customized percentile and weight and height at 2 years (adjusted for gender using z-score) was determined using regression analysis and by comparing z-scores for children with birth weight <10th versus ≥10th percentile. Results Weight z-score at 2 years was significantly lower in the <10th than in the ≥10th percentile group (median [interquartile range, IQR]: -0.66 [-1.58, -0.01] vs. -0.23 [-1.05, 0.55]; p < 0.001), and remained after adjusting for maternal education (p < 0.001). A similar relationship was noted for height z-score between groups (median [IQR]: -0.56 [-1.29, 0.19] vs. -0.24 [-0.99, 0.37]; p < 0.001). Positive relationships between customized birth weight percentile and weight and height at 2 years were noted (p < 0.001 for both), but were not strong (R 2=0.04 and 0.02, respectively). Conclusion Customized birth weight percentile is a minor determinant of weight at 2 years among children born preterm.

Original languageEnglish (US)
Pages (from-to)591-597
Number of pages7
JournalAmerican Journal of Perinatology
Volume32
Issue number6
DOIs
StatePublished - May 1 2015

Keywords

  • customized birth weight
  • fetal growth potential
  • preterm

ASJC Scopus subject areas

  • Pediatrics, Perinatology, and Child Health
  • Obstetrics and Gynecology

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