Reliability of body composition assessment using A-mode ultrasound in a heterogeneous sample.

Autor: Miclos-Balica M; Center for Modeling Biological Systems and Data Analysis, Department of Functional Sciences, Victor Babeş University of Medicine and Pharmacy, Timişoara, Romania., Muntean P; Center for Modeling Biological Systems and Data Analysis, Department of Functional Sciences, Victor Babeş University of Medicine and Pharmacy, Timişoara, Romania., Schick F; Center for Modeling Biological Systems and Data Analysis, Department of Functional Sciences, Victor Babeş University of Medicine and Pharmacy, Timişoara, Romania., Haragus HG; Department of Orthopedics, Victor Babeş University of Medicine and Pharmacy, Timişoara, Romania., Glisici B; Center for Modeling Biological Systems and Data Analysis, Department of Functional Sciences, Victor Babeş University of Medicine and Pharmacy, Timişoara, Romania., Pupazan V; Center for Modeling Biological Systems and Data Analysis, Department of Functional Sciences, Victor Babeş University of Medicine and Pharmacy, Timişoara, Romania., Neagu A; Center for Modeling Biological Systems and Data Analysis, Department of Functional Sciences, Victor Babeş University of Medicine and Pharmacy, Timişoara, Romania.; Department of Physics & Astronomy, University of Missouri, Columbia, MO, USA., Neagu M; Center for Modeling Biological Systems and Data Analysis, Department of Functional Sciences, Victor Babeş University of Medicine and Pharmacy, Timişoara, Romania. neagu.monica@umft.ro.
Jazyk: angličtina
Zdroj: European journal of clinical nutrition [Eur J Clin Nutr] 2021 Mar; Vol. 75 (3), pp. 438-445. Date of Electronic Publication: 2020 Sep 11.
DOI: 10.1038/s41430-020-00743-y
Abstrakt: Background/objectives: Several studies have addressed the validity of ultrasound (US) for body composition assessment, but few have evaluated its reliability. This study aimed to determine the reliability of percent body fat (%BF) estimates using A-mode US in a heterogeneous sample.
Subjects/methods: A group of 144 healthy adults (81 men and 63 women), 30.4 (10.1) years (mean (SD)), BMI 24.6 (4.7) kg/m 2 , completed 6 consecutive measurements of the subcutaneous fat layer thickness at 8 anatomical sites. The measurements were done, alternatively, by two testers, using a BodyMetrix™ instrument. To compute %BF, 4 formulas from the BodyView™ software were applied: 7-sites Jackson and Pollock, 3-sites Jackson and Pollock, 3-sites Pollock, and 1-point biceps.
Results: The formula with the most anatomic sites provided the best reliability quantified by the following measures: intraclass correlation coefficient (ICC) = 0.979 for Tester 1 (T1) and 0.985 for T2, technical error of measurement (TEM) = 1.07% BF for T1 and 0.89% BF for T2, and minimal detectable change (MDC) = 2.95% BF for T1, and 2.47% BF for T2. The intertester bias was -0.5% BF, whereas the intertester ICC was 0.972. The intertester MDC was 3.43% BF for the entire sample, 3.24% BF for men, and 3.65% BF for women.
Conclusions: A-mode US is highly reliable for %BF assessments, but it is more precise for men than for women. Examiner performance is a source of variability that needs to be mitigated to further improve the precision of this technique.
Databáze: MEDLINE
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