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[Interchangeability of different indirect methods for determining body composition].

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Summary

Comparing body composition methods, bioimpedance analyzers (BIA) showed the best agreement for fat mass (FM) estimates. Different BIA devices offer reliable body fat and lean mass measurements for clinical studies.

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Area of Science:

  • Physiology
  • Biomedical Engineering
  • Anthropometry

Background:

  • Accurate body composition assessment (muscle and fat mass) is crucial for clinical and epidemiological research.
  • Indirect methods are commonly used but device variability complicates data comparison.
  • Standardizing body composition measurements is essential for reliable research outcomes.

Purpose of the Study:

  • To evaluate the consistency of fat mass (FM), lean body mass, and body fat percentage (PBF) estimates.
  • To compare three different devices: ABC-02 Medas (BIA), InBody 770 (BIA), and BodyMetrix BX2000 (ultrasound).
  • To assess measurement agreement across genders in a diverse adult population.

Main Methods:

  • An observational, cross-sectional study involving 48 participants (38 women, 10 men).
  • Body composition determined using two bioimpedancemetry (BIA) devices (octopolar and tetrapolar schemes) and an ultrasound scanner.
  • Measurements included absolute fat mass (FM), relative body fat (PBF), and lean body mass.

Main Results:

  • Strong correlations observed for all body composition components across devices.
  • High agreement (CCC > 0.95) for absolute fat mass (FM) estimates between BIA devices.
  • Moderate agreement for body fat percentage (PBF) between BIA analyzers; weak agreement for other measurement pairs.

Conclusions:

  • Two bioimpedancemetry analyzers (InBody and ABC) demonstrated the highest agreement for fat mass estimation.
  • BIA methods provide consistent fat mass measurements at both group and individual levels.
  • Further research may be needed to refine ultrasound and cross-methodological comparisons.