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Prediction of percent total body fat in adult men using ultrasonic and anthropometric measurements versus DXA

Abstract : BACKGROUND: The aim of this study was to verify the accuracy of a portable ultrasound device associated to anthropometric measurements using a reference method, dual-energy x-ray absorptiometry (DXA) for estimate body fat (BF) and body fat percentage (BF%) in adult male. METHODS: A total of 63 subjects (18-60 years) participated for this analysis. Patients were voluntarily selected through a high variability in body mass index (BMI) and total BF. A cross-validation between ultrasound and anthropometric predictors of BF% was performed on 35 males in this study.The present study was to conduct and validate generalized prediction equation for total BF% using the combination of ultrasonic and anthropometric measurements versus DXA in a sample of French men with a large variability of BF%. We verified the accuracy of our ultrasonic measurements by performing an umbilical MRI at the same subcutaneous fat thickness. We developed a multiple regression model of BF and BF% estimate from ultrasound and anthropometric dimensions using the DXA reference method. RESULTS: BF% estimates was strongly correlated with BF% DXA on 63 males (R² =0.86, SEE=2.8%). A cross-validation study performed on 35 males showed again a high correlation (R²=0.86, SEE=2.9%) between BF% DXA and BF% estimate. The 95% limit of agreement with individual differences are [-5.1%; +5.7%]. CONCLUSIONS: Ultrasonic and anthropometric measurements are both accurate techniques to estimate BF%. Our results suggest that this ultrasound technique should be easy to use in epidemiologic studies.
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Submitted on : Monday, November 9, 2020 - 10:37:05 AM
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Jean-Claude Pineau. Prediction of percent total body fat in adult men using ultrasonic and anthropometric measurements versus DXA. Gazzetta Medica Italiana Archivio per le Scienze Mediche, Edizione Minerva Medica, In press. ⟨hal-02995427⟩



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