Development and validation of impedance-based equations for the prediction of total body water and fat-free mass in children aged 8–11 years

Accuracy of impedance analysis depends on population-specific prediction equations. The aim of this study was to propose new prediction equations to estimate body composition using impedance analysis for healthy Tunisian children and validate them using the deuterium oxide dilution (D2O) technique....

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Bibliographic Details
Published in:Clinical nutrition (Edinburgh, Scotland) Scotland), 2019-02, Vol.38 (1), p.227-233
Main Authors: Ben Jemaa, Houda, Mankaï, Amani, Khlifi, Sarra, Minaoui, Rim, Ghozzi, Dhekra, Zediri, Manel, Kortobi, Belhassen, Karmous, Inchirah, Ben Hmad, Halima, Ben Slama, Fethi, Jamoussi, Henda, Aguenaou, Hassan, El Kari, Khalid, Aouidet, Abdallah
Format: Article
Language:English
Subjects:
Body composition
Body Composition - physiology
Body Water - physiology
Child
Deuterium dilution
Deuterium Oxide
Electric Impedance
Fat-free mass
Female
Humans
Impedance analysis
Indicator Dilution Techniques
Male
Prediction equation
Reproducibility of Results
Total body water
Tunisia
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Summary:Accuracy of impedance analysis depends on population-specific prediction equations. The aim of this study was to propose new prediction equations to estimate body composition using impedance analysis for healthy Tunisian children and validate them using the deuterium oxide dilution (D2O) technique. Body composition was estimated by the Tanita impedance analyzer. The validity of this system was investigated in 134 school children aged between 8 and 11 years. The validity of other published equations was also tested in our sample. Total body water (TBW) and Fat-Free Mass (FFM) were determined using the D2O technique. Participants were divided equally into development (n = 67) and validation groups (n = 67) to develop prediction equation using linear regression models. The comparison between body composition obtained by Tanita system and by D2O technique illustrated a significant difference (p 
ISSN:0261-5614
1532-1983
DOI:10.1016/j.clnu.2018.01.028