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Segmental bioelectrical impedance analysis in children aged 8-12 y: 1. The assessment of whole-body composition

Segmental bioelectrical impedance analysis in children aged 8-12 y: 1. The assessment of whole-body composition
Segmental bioelectrical impedance analysis in children aged 8-12 y: 1. The assessment of whole-body composition
Objectives: To investigate the potential of segmental bioelectrical impedance analysis (BIA) for estimating whole-body composition in children.
Design: Strengths of relationships were determined between indices of impedance or specific resistivities of body segments and reference four-component model (4-CM) assessments of body composition.
Subjects: Eighteen boys and 19 girls aged 8-12 y.
Measurements: Whole-body and segment BIA and anthropometry were used to calculate impedance indices of the whole body and segments and specific resistivities of segments; total body water (TBW), fat-free mass (FFM) and body fat were assessed using the 4-CM.
Results: Segmental BIA indices were significantly related to body composition, provided that appropriate comparisons were undertaken for each index: impedance adjusted for unit segment length was better related to TBW and FFM, whereas segment specific resistivity was better related to body fat. Differences between body composition estimates obtained with the 4-CM and predicted using BIA were partly dependent on limb-to-trunk ratios of BIA indices.
Conclusion: Segmental BIA has potential for providing additional alternative approaches to the assessment of whole-body composition in children: (a) FFM and TBW were best related to impedance adjusted for segment length; (b) body fat was best related to segment specific resistivity; and (c) the relative influences of different segment BIA indices may be utilisable for generating more valid whole-body composition estimates.
body fat, fat-free mass, specific resistivity, four-component model
684-691
Fuller, N. J.
ba40a22c-6f8e-4e83-9c24-0e0755975d7e
Fewtrell, M. S.
c82d3786-239e-46b1-9e7a-ec5dae77ee15
Dewit, O.
685c578d-62da-4968-9a29-6c994a1db8b5
Elia, M.
964bf436-e623-46d6-bc3f-5dd04c9ef4c1
Wells, J. C.
e5748197-0b2c-43a2-9723-ce38d626deb8
Fuller, N. J.
ba40a22c-6f8e-4e83-9c24-0e0755975d7e
Fewtrell, M. S.
c82d3786-239e-46b1-9e7a-ec5dae77ee15
Dewit, O.
685c578d-62da-4968-9a29-6c994a1db8b5
Elia, M.
964bf436-e623-46d6-bc3f-5dd04c9ef4c1
Wells, J. C.
e5748197-0b2c-43a2-9723-ce38d626deb8

Fuller, N. J., Fewtrell, M. S., Dewit, O., Elia, M. and Wells, J. C. (2002) Segmental bioelectrical impedance analysis in children aged 8-12 y: 1. The assessment of whole-body composition. International Journal of Obesity and Related Metabolic Disorders, 26 (5), 684-691. (doi:10.1038/sj/ijo/0801988).

Record type: Article

Abstract

Objectives: To investigate the potential of segmental bioelectrical impedance analysis (BIA) for estimating whole-body composition in children.
Design: Strengths of relationships were determined between indices of impedance or specific resistivities of body segments and reference four-component model (4-CM) assessments of body composition.
Subjects: Eighteen boys and 19 girls aged 8-12 y.
Measurements: Whole-body and segment BIA and anthropometry were used to calculate impedance indices of the whole body and segments and specific resistivities of segments; total body water (TBW), fat-free mass (FFM) and body fat were assessed using the 4-CM.
Results: Segmental BIA indices were significantly related to body composition, provided that appropriate comparisons were undertaken for each index: impedance adjusted for unit segment length was better related to TBW and FFM, whereas segment specific resistivity was better related to body fat. Differences between body composition estimates obtained with the 4-CM and predicted using BIA were partly dependent on limb-to-trunk ratios of BIA indices.
Conclusion: Segmental BIA has potential for providing additional alternative approaches to the assessment of whole-body composition in children: (a) FFM and TBW were best related to impedance adjusted for segment length; (b) body fat was best related to segment specific resistivity; and (c) the relative influences of different segment BIA indices may be utilisable for generating more valid whole-body composition estimates.

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More information

Published date: 2002
Keywords: body fat, fat-free mass, specific resistivity, four-component model

Identifiers

Local EPrints ID: 25509
URI: http://eprints.soton.ac.uk/id/eprint/25509
PURE UUID: ffdd4361-f0e1-430f-8d12-19b5877d8659

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Date deposited: 07 Apr 2006
Last modified: 15 Mar 2024 07:03

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Contributors

Author: N. J. Fuller
Author: M. S. Fewtrell
Author: O. Dewit
Author: M. Elia
Author: J. C. Wells

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