Body-composition assessment in infancy: air-displacement plethysmography compared with a reference 4-compartment

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Kenneth J Ellis1, Manjiang Yao, Roman J Shypailo

  • 1USDA-ARS Children's Nutrition Research Center, Department of Pediatrics, Baylor College of Medicine, Houston, Texas 77030, USA. kellis@bcm.tmc.edu

The American Journal of Clinical Nutrition
|January 9, 2007
PubMed

Insights

The PEA POD system accurately measures infant body composition, providing reliable data for tracking growth and health. This method is precise and easy to use for both research and clinical applications.

Area of Science:

  • Pediatric Health
  • Body Composition Analysis
  • Infant Growth Studies

Background:

  • Accurate infant body composition assessment is crucial for understanding links between early nutrition, growth, and adult health.
  • Current methods may lack precision or accessibility for routine infant monitoring.

Purpose of the Study:

  • To evaluate the performance and accuracy of the infant-sized air-displacement plethysmograph (PEA POD Infant Body Composition System).
  • To determine the system's suitability for measuring body composition in infants.

Main Methods:

  • Utilized the PEA POD system on 49 healthy infants (1.7-23.0 weeks).
  • Compared PEA POD percentage body fat (%BF) measurements against a 4-compartment (4-C) reference model.
  • The 4-C model incorporated total body water, bone mineral content, and total body potassium.

Main Results:

  • PEA POD system demonstrated high reproducibility for %BF measurements (0.4 +/- 1.3%).
  • Mean %BF from PEA POD (16.9 +/- 6.5%) closely matched the 4-C model (16.3 +/- 7.2%).
  • Strong correlation (R2 = 0.73) and agreement with the line of identity between PEA POD and 4-C model %BF values.

Conclusions:

  • The PEA POD system offers a reliable, accurate, and immediate method for assessing infant body fat percentage.
  • Its ease of use, precision, safety, and bedside accessibility make it ideal for monitoring infant body composition changes in research and clinical settings.
Abstract

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