Good agreement between bioelectrical impedance and dual-energy X-ray absorptiometry for estimating changes in body composition during weight loss in overweight young women.

Good agreement between bioelectrical impedance and dual-energy X-ray absorptiometry for estimating changes in body composition during weight loss in overweight young women. Research Abstract Details 

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Good agreement between bioelectrical impedance and dual-energy X-ray absorptiometry for estimating changes in body composition during weight loss in overweight young women. Abstract Text:

Rebecca Thomson,Grant D Brinkworth,Jonathan D Buckley,Manny Noakes,Peter M Clifton,Rebecca Thomson,Grant D Brinkworth,Jonathan D Buckley,Manny Noakes,Peter M Clifton,

AIMS: To compare estimations of body composition using two different methods of bioelectrical impedance analysis (BIA) with dual X-ray absorptiometry (DXA) for estimating body composition during weight loss in overweight and obese young females. METHODS: Twenty-four overweight or obese females (age 29.5+/-6.1 years, BMI 36.4+/-4.3kg/m(2)) had body composition assessed using single-frequency (Tanita Ultimate Scaletrade mark; SF-BIA) and multi-frequency (Impedimed SFB7trade mark; MF-BIA) BIA and DXA before and after a 10-week weight loss intervention. RESULTS: MF-BIA estimates of body composition showed good absolute agreement with DXA, as evidenced by the small biases in the estimation of fat free mass (FFM), fat mass (FM) and percentage body fat (BF%); however, the limits of agreement for each variable were wide (bias +/-1.96 standard deviation; FFM -1.6+/-6.5kg, FM 1.6+/-6.5kg, BF% 1.4+/-6.3%). SF-BIA exhibited a larger bias with wide limits of agreement (FFM 3.8+/-9.1kg, FM -3.8+/-9.1kg, BF% -4.37+/-10.3%). During weight loss the values provided by MF-BIA and SF-BIA were not significantly different from DXA (p0.89) due to small bias and the limits of agreement were narrow (MF-BIA: FFM -0.01+/-3.74kg, FM 0.01+/-3.74kg, BF% 0.22+/-3.40%; SF-BIA: FFM 0.40+/-3.92kg, FM -0.40+/-3.92kg, BF% 0.25+/-3.40%). CONCLUSION: Compared with DXA, both the MF-BIA and SF-BIA accurately assessed changes in body composition with weight loss but, compared with SF-BIA, MF-BIA provided superior cross-sectional estimates of body composition.

Good agreement between bioelectrical impedance and dual-energy X-ray absorptiometry for estimating changes in body composition during weight loss in overweight young women. Publishing Authors By Initials

R Thomson,GD Brinkworth,JD Buckley,M Noakes,PM Clifton,R Thomson,GD Brinkworth,JD Buckley,M Noakes,PM Clifton,

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Good agreement between bioelectrical impedance and dual-energy X-ray absorptiometry for estimating changes in body composition during weight loss in overweight young women. Journal Published:

PUBLICATION TYPE: Journal Article

Journal: Clinical nutrition (Edinburgh, Scotland)

VOLUME: 26

Page Numbers: 771-7

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ISSN: 0261-5614

DAY: 23

MONTH: 10

YEAR: 2007

Good agreement between bioelectrical impedance and dual-energy X-ray absorptiometry for estimating changes in body composition during weight loss in overweight young women. Information

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LANGUAGE: eng

NlmUniqueID: 8309603

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Grant and Affiliation Information for Good agreement between bioelectrical impedance and dual-energy X-ray absorptiometry for estimating changes in body composition during weight loss in overweight young women.

AFFILIATION: CSIRO Human Nutrition, P.O. Box 10041 BC, Adelaide 5000, Australia; ATN Centre for Metabolic Fitness & Nutritional Physiology Research Centre, School of Health Sciences, University of South Australia, Australia.

Country: England

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MEDLINETA: Clin Nutr

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