Gymnastik- och idrottshögskolan, GIH

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Assessment of change in body fat percentage with DXA and eight-electrode BIA in centrally obese women.
Karolinska institutet.ORCID-id: 0000-0001-7335-3796​
2007 (Engelska)Ingår i: Medicine & Science in Sports & Exercise, ISSN 0195-9131, E-ISSN 1530-0315, Vol. 39, nr 12, s. 2199-203Artikel i tidskrift (Refereegranskat) Published
Abstract [en]

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.

Ort, förlag, år, upplaga, sidor
2007. Vol. 39, nr 12, s. 2199-203
Nationell ämneskategori
Folkhälsovetenskap, global hälsa, socialmedicin och epidemiologi
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URN: urn:nbn:se:gih:diva-4755DOI: 10.1249/mss.0b013e3181579.38aPubMedID: 18046191OAI: oai:DiVA.org:gih-4755DiVA, id: diva2:1068858
Tillgänglig från: 2017-01-26 Skapad: 2017-01-26 Senast uppdaterad: 2017-11-29Bibliografiskt granskad

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Hemmingsson, Erik

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Medicine & Science in Sports & Exercise
Folkhälsovetenskap, global hälsa, socialmedicin och epidemiologi

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