Predictive accuracy of bioimpedance in estimating fat-free mass of African-American women
Abstract
The purpose of this study was to identify the BIA (bioimpedance analysis) equation that yields the best estimate of body composition for 122 premenopausal African-American women (18-40 yr). Total body density (Db) was determined by hydrodensitometry at residual lung volume and converted to %BFHD using the Siri (31) formula, %BFHD was used to calculate reference fat-free mass (FFM). Resistance and reactance were measured using a Valhalla bioimpedance analyzer. The predictive accuracy of generalized, age-gender, race-specific, fatness-specific, and the Valhalla manufacturer's BIA equations was compared. There were significant correlations between FFMHD and FFMBIA for all BIA equations (r = 0.85 to 0.92). Except for the modified Segal fatness-specific equations, the prediction errors (SEE and E) exceeded 2.8 kg. For individuals, the %BF derived from FFMBIA predicted by the modified Segal equations was within +/- 3.5% BF for 69% of the subjects. This percentage was less (34-53%) for other equations. These results suggest that the predictive accuracy of BIA for estimating body composition of African-American women is improved when fatness-specific equations are used. We recommend using the modified Segal fatness-specific equations to assess FFM and %BF of premenopausal African-American women.
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Sun, Ainsworth, and Wang equations included individuals from all weight ranges; Jakicic's sample was exclusively obese; Hortobagyi included college athletes.
“In addition, the Sun (7), Ainsworth (8), and Wang (9) equations included individuals from all weight ranges, whereas Jakicic's (4) sample was exclusively obese, and Hortobagyi (10) included college athletes.”
From Comparison of Body Composition Methods in Obese African‐American Women (2006) · cites this paper as [8]
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- Authors
- AINSWORTH, B. E., STOLARCZYK, L. M., HEYWARD, V. H., BERRY, C. B., IRWIN, M. L., & MUSSULMAN, L. M.
- Affiliations
- University of North Carolina at Chapel Hill (US)
- Venue
- Medicine & Science in Sports & Exercise
- Published
- 1997-06
- Volume
- 29
- Issue
- 6
- Pages
- 781-787
- ISSN
- 0195-9131 (ISSN-L)
- OpenAlex
- W2061460889
- Semantic Scholar
- bbbeeac49dfd9897317455f4155490265d3308ed
- Cited by
- 18
- References
- 26
- Citations by year
- 2021: 6
- FWCI
- 1.35
- Type
- journal article
- Language
- en
- Open access
- closed
- Locations
- Medicine & Science in Sports & Exercise (publishedVersion)
- PubMed (publishedVersion)
- Topics
- Health Sciences › Medicine › Physiology › Body Composition Measurement Techniques
- Health Sciences › Medicine › Public Health, Environmental and Occupational Health › Obesity, Physical Activity, Diet
- Physical Sciences › Engineering › Electrical and Electronic Engineering › Electrical and Bioimpedance Tomography
- Keywords
- bioelectrical impedance analysis, fat-free mass, body composition, African American women, premenopausal women, prediction accuracy, body fat percentage
- MeSH terms
- Adipose Tissue, Adolescent, Adult, Black or African American, Body Composition, Female, Humans
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