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Article Dans Une Revue Annals of Nutrition and Metabolism Année : 2010

Ultrasound measurement of total body fat in obese adolescents

Résumé

Background/Aims: To compare body fat (BF) measurements obtained with a new ultrasound method with those assessed by dual-energy X-ray absorptiometry (DEXA) in obese adolescents. Methods: In 94 adolescents (57 females and 37 males) aged 12-19 years and body mass index (BMI) exceeding 30 kg*m-2, the z-score BMI for age was 6.7 (adolescent girls) and 6.6 (adolescent boys) >97th percentile. BF was measured using DEXA and a method based on ultrasound measurements, body weight, height, abdominal circumference and mid-thigh circumference. Results: Obesity class I was noted in 39%, II in 28% and III in 33% of the patients. BF by ultrasound correlated closely with BF by DEXA, in both females (r = 0.958) and males (r = 0.981), with standard errors of the estimates (SEE) being 2.9 and 2.5 kg, respectively. The ultrasound method was more accurate than the skinfold technique (n = 24; SEE: 2.2 vs. 6.5 kg, respectively). In 13 adolescents who had marked weight loss after 6 months of treatment, the decrease in DEXA-measured BF correlated closely with the decrease in ultrasound-measured BF (r = 0.95). Conclusions: Our innovative portable ultrasound technique has advantages in terms of reliability, reproducibility, accuracy and costs for screening and monitoring obese adolescents. A patent application has been submitted. Our method should prove valuable for epidemiological studies.
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Dates et versions

hal-00820292 , version 1 (03-05-2013)

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Jean-Claude Pineau, Loïc Lalys, Michel Bocquet, Anne-Marie Guihard-Costa, M. Polak, et al.. Ultrasound measurement of total body fat in obese adolescents. Annals of Nutrition and Metabolism, 2010, 56, pp.36-44. ⟨10.1159/000265849⟩. ⟨hal-00820292⟩
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