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Jørgen Frøkiær

Precision and within- and between-day variation of bioimpedance parameters in children aged 2-14 years

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  • Nuklearmedicinsk Afdeling, Aalborg Sygehus
  • Faculty of Health Sciences
  • Biomedical Radio Isotope Techniques
BACKGROUND & AIMS: Bioimpedance spectroscopy (BIS) offers the possibility to perform rapid estimates of fluid distribution and body composition. Few studies, however, have addressed the precision and biological variation in a pediatric population. Our objectives were to evaluate precision, variation within- and between-days for the BIS-determined parameters total body fluid, extra-cellular fluid, intra-cellular fluid, body cell mass, fat-free mass, extra-cellular resistance, intra-cellular resistance and percentage body fat using a Xitron 4200. METHODS: All 133 children (81 boys, 52 girls; 2.4-14.9 years) had one series measured on day one (precision population). Forty-four children had a second series on day one (within-day sub-population). Thirty-two children had a series measured on the next day (between-day sub-population). Each measurement series consisted of three repeated measurements. A linear mixed model was used for statistical analysis. RESULTS: The precision was 0.3-0.8% in children ≥6 years and 0.5-2.4% in children
Original languageEnglish
JournalClinical Nutrition
Pages (from-to)326-331
Number of pages6
Publication statusPublished - 2011

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