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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.
Clin Nutr. 2007 Dec; 26(6):771-7.CN

Abstract

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+/-4.3 kg/m(2)) had body composition assessed using single-frequency (Tanita Ultimate Scale; SF-BIA) and multi-frequency (Impedimed SFB7; 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+/-6.5 kg, FM 1.6+/-6.5 kg, BF% 1.4+/-6.3%). SF-BIA exhibited a larger bias with wide limits of agreement (FFM 3.8+/-9.1 kg, FM -3.8+/-9.1 kg, BF% -4.37+/-10.3%). During weight loss the values provided by MF-BIA and SF-BIA were not significantly different from DXA (p> or =0.89) due to small bias and the limits of agreement were narrow (MF-BIA: FFM -0.01+/-3.74 kg, FM 0.01+/-3.74 kg, BF% 0.22+/-3.40%; SF-BIA: FFM 0.40+/-3.92 kg, FM -0.40+/-3.92 kg, 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.

Authors+Show Affiliations

CSIRO Human Nutrition, PO Box 10041 BC, Adelaide 5000, Australia.No affiliation info availableNo affiliation info availableNo affiliation info availableNo affiliation info available

Pub Type(s)

Journal Article
Research Support, Non-U.S. Gov't

Language

eng

PubMed ID

17936443

Citation

Thomson, Rebecca, et al. "Good Agreement Between Bioelectrical Impedance and Dual-energy X-ray Absorptiometry for Estimating Changes in Body Composition During Weight Loss in Overweight Young Women." Clinical Nutrition (Edinburgh, Scotland), vol. 26, no. 6, 2007, pp. 771-7.
Thomson R, Brinkworth GD, Buckley JD, et al. Good agreement between bioelectrical impedance and dual-energy X-ray absorptiometry for estimating changes in body composition during weight loss in overweight young women. Clin Nutr. 2007;26(6):771-7.
Thomson, R., Brinkworth, G. D., Buckley, J. D., Noakes, M., & Clifton, P. M. (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. Clinical Nutrition (Edinburgh, Scotland), 26(6), 771-7.
Thomson R, et al. Good Agreement Between Bioelectrical Impedance and Dual-energy X-ray Absorptiometry for Estimating Changes in Body Composition During Weight Loss in Overweight Young Women. Clin Nutr. 2007;26(6):771-7. PubMed PMID: 17936443.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - Good agreement between bioelectrical impedance and dual-energy X-ray absorptiometry for estimating changes in body composition during weight loss in overweight young women. AU - Thomson,Rebecca, AU - Brinkworth,Grant D, AU - Buckley,Jonathan D, AU - Noakes,Manny, AU - Clifton,Peter M, Y1 - 2007/10/23/ PY - 2006/05/18/received PY - 2007/06/12/revised PY - 2007/08/10/accepted PY - 2007/10/16/pubmed PY - 2008/3/1/medline PY - 2007/10/16/entrez SP - 771 EP - 7 JF - Clinical nutrition (Edinburgh, Scotland) JO - Clin Nutr VL - 26 IS - 6 N2 - 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+/-4.3 kg/m(2)) had body composition assessed using single-frequency (Tanita Ultimate Scale; SF-BIA) and multi-frequency (Impedimed SFB7; 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+/-6.5 kg, FM 1.6+/-6.5 kg, BF% 1.4+/-6.3%). SF-BIA exhibited a larger bias with wide limits of agreement (FFM 3.8+/-9.1 kg, FM -3.8+/-9.1 kg, BF% -4.37+/-10.3%). During weight loss the values provided by MF-BIA and SF-BIA were not significantly different from DXA (p> or =0.89) due to small bias and the limits of agreement were narrow (MF-BIA: FFM -0.01+/-3.74 kg, FM 0.01+/-3.74 kg, BF% 0.22+/-3.40%; SF-BIA: FFM 0.40+/-3.92 kg, FM -0.40+/-3.92 kg, 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. SN - 1532-1983 UR - https://www.unboundmedicine.com/medline/citation/17936443/Good_agreement_between_bioelectrical_impedance_and_dual_energy_X_ray_absorptiometry_for_estimating_changes_in_body_composition_during_weight_loss_in_overweight_young_women_ L2 - https://linkinghub.elsevier.com/retrieve/pii/S0261-5614(07)00132-X DB - PRIME DP - Unbound Medicine ER -