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

Rebecca Ramsey, E Isenring, L Daniels

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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.

Original languageEnglish
Pages (from-to)26-30
Number of pages5
JournalJournal of Nutrition, Health and Aging
Volume16
Issue number1
DOIs
Publication statusPublished - Jan 2012

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Electric Impedance
Foot
Fats
Equipment and Supplies
Hand
Dielectric Spectroscopy
Knee Osteoarthritis
Public Hospitals
Body Composition
Population
Orthopedics
Cross-Sectional Studies

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@article{7a274d6263074a9d9ae0bed9adeeecac,
title = "Comparing measures of fat-free mass in overweight older adults using three different bioelectrical impedance devices and three prediction equations",
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.",
author = "Rebecca Ramsey and E Isenring and L Daniels",
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language = "English",
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Comparing measures of fat-free mass in overweight older adults using three different bioelectrical impedance devices and three prediction equations. / Ramsey, Rebecca; Isenring, E; Daniels, L.

In: Journal of Nutrition, Health and Aging, Vol. 16, No. 1, 01.2012, p. 26-30.

Research output: Contribution to journalArticleResearchpeer-review

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T1 - Comparing measures of fat-free mass in overweight older adults using three different bioelectrical impedance devices and three prediction equations

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AU - Isenring, E

AU - Daniels, L

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N2 - 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.

AB - 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.

U2 - 10.1007/s12603-011-0085-6

DO - 10.1007/s12603-011-0085-6

M3 - Article

VL - 16

SP - 26

EP - 30

JO - Journal of Nutrition, Health and Aging

JF - Journal of Nutrition, Health and Aging

SN - 1760-4788

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