Reliability of multiple frequency bioelectrical impedance analysis: An inter-machine comparison

L C Ward; N M Byrne; Kerry-Lee Rutter; L Hennoste; A P Hills; B H Cornish; B J Thomas

doi:10.1002/(SICI)1520-6300(1997)9:1<63::AID-AJHB9>3.0.CO;2-R

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Reliability of multiple frequency bioelectrical impedance analysis: An inter-machine comparison

Journal article

Peer reviewed

Reliability of multiple frequency bioelectrical impedance analysis: An inter-machine comparison

L C Ward, N M Byrne, Kerry-Lee Rutter, L Hennoste, A P Hills, B H Cornish and B J Thomas

American Journal of Human Biology, Vol.9(1), pp.63-72

1997

DOI: https://doi.org/10.1002/(SICI)1520-6300(1997)9:1<63::AID-AJHB9>3.0.CO;2-R

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https://doi.org/10.1002/(SICI)1520-6300(1997)9:1<63::AID-AJHB9>3.0.CO;2-RView

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Abstract

Evolutionary Biology

Biochemistry and Cell Biology

Nutrition and Dietetics

The technical reliability (i.e., interinstrument and interoperator reliability) of three SEAC-swept frequency bioimpedance monitors was assessed for both errors of measurement and associated analyses. In addition, intraoperator and intrainstrument variability was evaluated for repeat measures over a 4-hour period. The measured impedance values from a range of resistance-capacitance circuits were accurate to within 3% of theoretical values over a range of 50-800 ohms. Similarly, phase was measured over the range 1°-19° with a maximum deviation of 1.3° from the theoretical value. The extrapolated impedance at zero frequency was equally well determined (±3%). However, the accuracy of the extrapolated value at infinite frequency was decreased, particularly at impedances below 50 ohms (approaching the lower limit of the measurement range of the instrument). The interinstrument/operator variation for whole body measurements were recorded on human volunteers with biases of less than ±1% for measured impedance values and less than 3% for phase. The variation in the extrapolated values of impedance at zero and infinite frequencies included variations due to operator choice of the analysis parameters but was still less than ±0.5%. Am. J. Hum. Biol. 9:63-72 © 1997 Wiley-Liss, Inc.

Details

Title: Reliability of multiple frequency bioelectrical impedance analysis: An inter-machine comparison
Authors: L C Ward (Author) - University of Queensland
N M Byrne (Author) - Queensland University of Technology
Kerry-Lee Rutter (Author) - University of Queensland
L Hennoste (Author) - University of Queensland
A P Hills (Author) - Queensland University of Technology
B H Cornish (Author) - Queensland University of Technology
B J Thomas (Author) - Queensland University of Technology
Publication details: American Journal of Human Biology, Vol.9(1), pp.63-72
Publisher: John Wiley & Sons Inc.
Date published: 1997
DOI: 10.1002/(SICI)1520-6300(1997)9:1<63::AID-AJHB9>3.0.CO;2-R
ISSN: 1042-0533
Organisation Unit: School of Tertiary Access - Legacy; School of Education and Tertiary Access; University of the Sunshine Coast, Queensland
Language: English
Record Identifier: 99449984602621
Output Type: Journal article

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