[Postnatal growth of very low birth weight infants. II. Anthropometry at one year of age, a longitudinal study]

Insights

Extremely low birth weight (ELBW) infants, especially those under 1,001 grams, show significantly lower weight and height at one year. These ELBW infants also exhibit reduced head circumference, indicating potential developmental concerns.

Area of Science:

  • Neonatalogy
  • Pediatric Growth and Development
  • Public Health

Context:

  • A prospective study was conducted in Santiago, Chile, from 1983-1987.
  • 154 newborns with birth weight less than 1,501 grams were monitored up to one year of age.
  • Infants were categorized into three groups based on birth weight: <1,001g (Group A), 1,000-1,250g (Group B), and 1,251-1,500g (Group C).

Purpose:

  • To assess the growth and developmental outcomes of low birth weight infants up to one year of age.
  • To compare anthropometric measurements (weight, height, head circumference) across different birth weight categories.
  • To identify potential growth faltering in extremely low birth weight (ELBW) infants.

Summary:

  • At one year, Group A infants (<1,001g) had a mean weight of 6,724 ± 804g, Group B (1,000-1,250g) 7,782 ± 927g, and Group C (1,251-1,500g) 7,941 ± 903g.
  • Group A infants' weight and height were below 2 standard deviations (DS) of normal Chilean averages for their socioeconomic and geographic group.
  • Group B and C infants' measurements were between 1 and 2 DS, with head circumference within normal ranges, unlike Group A infants who were below 2 DS.

Impact:

  • Findings highlight the critical impact of extremely low birth weight on long-term growth trajectories.
  • Suggests a need for targeted nutritional and developmental support for ELBW infants.
  • Provides valuable data for understanding growth patterns in low birth weight populations in developing regions.

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