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Related Experiment Videos

The Biagram vector: a graphical relation between reactance and phase angle measured by bioelectrical analysis in

F Savino1, F Cresi, G Grasso

  • 1Department of Pediatrics, University of Turin, 'Regina Margherita' Children Hospital, Torino, Italy. francesco.savino@unito.it

Annals of Nutrition & Metabolism
|February 28, 2004
PubMed
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The Biagram vector, a novel method for assessing nutritional status, shows a significant increasing trend in healthy infants during their first year of life. This vector analysis provides valuable insights into body composition changes in early development.

Area of Science:

  • Pediatric Nutrition
  • Biomedical Engineering
  • Body Composition Analysis

Background:

  • The Biagram vector, derived from direct reactance and phase angle measurements, offers an anthropometric-independent method for nutritional status evaluation.
  • It represents an emerging technique with potential clinical applications in assessing body composition.

Purpose of the Study:

  • To calculate and graphically represent the Biagram vector in a cohort of healthy infants within their first year of life.
  • To establish normative data for the Biagram vector in this age group.

Main Methods:

  • A cross-sectional study included 174 healthy infants (under 1 year old).
  • Infants were categorized into three age groups (0-3.99, 4-7.99, and 8-11.99 months).
  • Bioelectric impedance analysis (BIA) was conducted using a tetrapolar single-frequency phase-sensitive impedance analyzer.

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Main Results:

  • The Biagram vector demonstrated a statistically significant increasing trend throughout the first year of life (p < 0.05).
  • Females exhibited higher Biagram vector values than males in the youngest age group (0-3.99 months, p < 0.05).
  • Confidence ellipses for the Biagram vector were plotted for each age group, facilitating comparisons.

Conclusions:

  • The Biagram vector analysis reveals an increasing trend with an accelerated gain rate in infants under one year, reflecting dynamic body composition changes.
  • These findings highlight the potential utility of the Biagram vector for monitoring infant nutritional status in clinical settings.