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Development of a single-frequency bioimpedance prediction equation for fat-free mass in an adult Indigenous Australian population

Hughes, Jaquelyne T., Maple-Brown, Louise J., Piers, Leonard S., Meerkin, J., O'Dea, Kerin and Ward, Leigh C. (2014). Development of a single-frequency bioimpedance prediction equation for fat-free mass in an adult Indigenous Australian population. European Journal of Clinical Nutrition,69:28-33.

Document type: Journal Article
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IRMA ID 11436xPUB9
Title Development of a single-frequency bioimpedance prediction equation for fat-free mass in an adult Indigenous Australian population
Author Hughes, Jaquelyne T.
Maple-Brown, Louise J.
Piers, Leonard S.
Meerkin, J.
O'Dea, Kerin
Ward, Leigh C.
Journal Name European Journal of Clinical Nutrition
Publication Date 2014
Volume Number 69
ISSN 0954-3007   (check CDU catalogue open catalogue search in new window)
Scopus ID 2-s2.0-84898692515
Start Page 28
End Page 33
Total Pages 6
Place of Publication United Kingdom
Publisher Nature Publishing Group
HERDC Category C1 - Journal Article (DIISR)
Abstract Background/Objectives:
To describe the development of a single-frequency bioimpedance prediction equation for fat-free mass (FFM) suitable for adult Aboriginal and Torres Strait Islander peoples with and without diabetes or indicators of chronic kidney disease (CKD).

Subjects/Methods:
FFM was measured by whole-body dual-energy X-ray absorptiometry in 147 adult Indigenous Australians. Height, weight, body circumference and resistance were also measured. Adults with and without diabetes and indicators of CKD were examined. A random split sample with internal cross-validation approach was used to predict and subsequently validate FFM using resistance, height, weight, age and gender against measured FFM.

Results:
Among 147 adults with a median body mass index of 31 kg/m2, the final model of FFM was FFM (kg)=0.432 (height, cm2/resistance, ohm)−0.086 (age, years)+0.269 (weight, kg)−6.422 (if female)+16.429. Adjusted R2 was 0.94 and the root mean square error was 3.33 kg. The concordance was high (rc=0.97) between measured and predicted FFM across a wide range of FFM (31–85 kg).

Conclusions:
In the context of the high burden of diabetes and CKD among adult Indigenous Australians, this new equation for FFM was both accurate and precise and based on easily acquired variables (height, weight, age, gender and resistance) among a heterogeneous adult cohort.
DOI http://dx.doi.org/10.1038/ejcn.2014.54   (check subscription with CDU E-Gateway service for CDU Staff and Students  check subscription with CDU E-Gateway in new window)
 
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