Comparing measures of fat-free mass in overweight older adults using three different bioelectrical impedance devices and three prediction equations

Ramsey, Rebecca, Isenring, E. and Daniels, L. (2012) Comparing measures of fat-free mass in overweight older adults using three different bioelectrical impedance devices and three prediction equations. Journal of Nutrition, Health and Aging, 16 1: 26-30. doi:10.1007/s12603-011-0085-6

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Author Ramsey, Rebecca
Isenring, E.
Daniels, L.
Title Comparing measures of fat-free mass in overweight older adults using three different bioelectrical impedance devices and three prediction equations
Journal name Journal of Nutrition, Health and Aging   Check publisher's open access policy
ISSN 1279-7707
1760-4788
Publication date 2012-01
Year available 2011
Sub-type Article (original research)
DOI 10.1007/s12603-011-0085-6
Volume 16
Issue 1
Start page 26
End page 30
Total pages 5
Place of publication Paris, France
Publisher Editions SERDI
Collection year 2012
Language eng
Formatted abstract
Objectives: To compare measures of fat-free mass (FFM) by three different bioelectrical impedance analysis (BIA) devices and to assess the agreement between three different equations validated in older adult and/or overweight populations.
Design: Cross-sectional study.
Setting: Orthopaedics ward of Brisbane public hospital, Australia.
Participants: Twenty-two overweight, older Australians (72 yr ± 6.4, BMI 34 kg/m2 ± 5.5) with knee osteoarthritis.
Measurements: Body composition was measured using three BIA devices: Tanita 300-GS (foot-to-foot), Impedimed DF50 (hand-to-foot) and Impedimed SFB7 (bioelectrical impedance spectroscopy (BIS)). Three equations for predicting FFM were selected based on their ability to be applied to an older adult and/or overweight population. Impedance values were extracted from the hand-to-foot BIA device and included in the equations to estimate FFM.
Results: The mean FFM measured by BIS (57.6 kg ± 9.1) differed significantly from those measured by foot-to-foot (54.6 kg ± 8.7) and hand-to-foot BIA (53.2 kg ± 10.5) (P < 0.001). The mean ± SD FFM predicted by three equations using raw data from hand-to-foot BIA were 54.7 kg ± 8.9, 54.7 kg ± 7.9 and 52.9 kg ± 11.05 respectively. These results did not differ from the FFM predicted by the hand-to-foot device (F = 2.66, P = 0.118).
Conclusions: Our results suggest that foot-to-foot and hand-to-foot BIA may be used interchangeably in overweight older adults at the group level but due to the large limits of agreement may lead to unacceptable error in individuals. There was no difference between the three prediction equations however these results should be confirmed within a larger sample and against a reference standard.
Keyword Body composition
Bioelectrical impedance analysis (BIA)
Bioelectrical impedance spectroscopy (BIS)
Older adults
Q-Index Code C1
Q-Index Status Provisional Code
Institutional Status Non-UQ
Additional Notes Online Firstâ„¢, 14 May 2011

Document type: Journal Article
Sub-type: Article (original research)
Collections: Non HERDC
School of Human Movement and Nutrition Sciences Publications
 
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Created: Wed, 26 Oct 2011, 13:00:00 EST by Dr Liz Isenring on behalf of School of Human Movement and Nutrition Sciences