| Assessment of change in body fat percentage with DXA and eight-electrode BIA in centrally obese women. | |
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MedLine Citation:
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PMID: 18046191 Owner: NLM Status: MEDLINE |
Abstract/OtherAbstract:
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PURPOSE: To compare estimates of change in percent body fat (Delta%BF) between DXA and BIA8 in abdominally obese women. METHODS: Six-month longitudinal study of 106 women (baseline: age 48.2 +/- 7.6 yr; BMI 30.4 +/- 2.9 kg.m; %BFDXA 45.8 +/- 3.6%) participating in an exercise-oriented behavior-change program (walking and bicycling). Fatness was measured by DXA and Tanita BC-418 (BIA8). Agreement between methods was assessed, and regression analysis was used to find predictors of the deviation between methods for estimating changes in fat mass percentage. RESULTS: The methods differed significantly, both at baseline and follow-up (-5.0 and -4.4%BF, respectively; both P < 0.001). The mean Delta%BF was -1.1 +/- 2.5%BFDXA and -0.5 +/- 2.2%BFBIA8 (mean difference between methods 0.6 +/- 1.8%BF; P < 0.001; 95% limits of agreement -3.0 to 4.2%BF), with a range of -14.8 to 3.3%BFDXA and -9.4 to 3.5%BFBIA8. Approximately 49% of the variation in the difference between methods was explained by variations in age (beta = -0.05; P = 0.006), DeltaBMI (beta = 0.98; P < 0.001), and Delta%BFDXA (beta = -0.71; P < 0.001), indicating that the larger the change, the greater the discrepancy between methods. CONCLUSION: The difference between methods regarding Delta%BF was statistically significant, but it was of small magnitude. However, with increasing Delta%BF, increasing discrepancies were observed, implying that the BIA equipment may have limited validity for detecting larger fat losses. Both clinicians and researchers may benefit from awareness of this potential limitation. |
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Authors:
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Martin Neovius; Joanna Uddén; Erik Hemmingsson |
Publication Detail:
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Type: Comparative Study; Journal Article; Research Support, Non-U.S. Gov't |
Journal Detail:
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Title: Medicine and science in sports and exercise Volume: 39 ISSN: 0195-9131 ISO Abbreviation: Med Sci Sports Exerc Publication Date: 2007 Dec |
Date Detail:
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Created Date: 2007-11-29 Completed Date: 2008-02-25 Revised Date: - |
Medline Journal Info:
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Nlm Unique ID: 8005433 Medline TA: Med Sci Sports Exerc Country: United States |
Other Details:
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Languages: eng Pagination: 2199-203 Citation Subset: IM; S |
Affiliation:
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Department of Medicine, Karolinska Institutet, Karolinska University Hospital Huddinge, Stockholm, Sweden. Martin.neovius@ki.se |
Export Citation:
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| MeSH Terms | |
Descriptor/Qualifier:
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Abdominal Fat
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metabolism Absorptiometry, Photon* Adult Anthropometry / methods* Bariatrics / instrumentation Body Fat Distribution / statistics & numerical data* Electric Impedance* Exercise / physiology Female Humans Longitudinal Studies Middle Aged Obesity / epidemiology*, metabolism Reproducibility of Results Time Factors |
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
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