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Updated: Oct 5, 2026

Assessment of Child Anthropometry in a Large Epidemiologic Study
Published on: February 2, 2017
[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.
Abstract:
A prospective study up to one year of age, was done in 154 newborns with birth weight less than 1,501 g at a Metropolitan Hospital of Santiago, Chile, between 1983 and 1987. The patients were divided in groups A: 44 patients with birth weight less than 1,001 g; B: 68 patients with birth weights from 1,000 to 1,250 g and C: 48 patients with birth weight 1,251 to 1,500 g. At age one year weight of group A patients was 6,724 +/- 804 g; group B 7,782 +/- 927 g and group C 7,941 +/- 903 g. Weight and height of group A babies at one year of age were below 2 DS of the average weight and height for normal chilean babies of the same socioeconomic status and geographic area with 3,318 g mean birth weight. Group B and C were between 1 and 2 DS. Head circumference was within normal ranges in groups B and C patients, but in group A patients if was below 2 DS of the average.
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