Adiposity assessments: Agreement between dual‐energy X‐ray absorptiometry and anthropometric measures in U.S. children. (18th February 2014)

• Record Type: Journal Article
• Authors: Tuan, Nguyen T.; Wang, Youfa
• Is Part Of: Obesity. Volume 22:Number 6(2014:Jun.)
• Page Start: 1495
• Page End: 1504
• Publication Date: 2014-02-18
• Subjects: Obesity -- Periodicals; 616.398005
• DOI: 10.1002/oby.20689
• Languages: English
• ISSNs: 1930-7381

Abstract

<abstract abstract-type="main"> <title> <x xml:space="preserve">Abstract</x> </title> <sec id="oby20689-sec-0002" sec-type="section"> <title>Objectives</title> <p>To evaluate performance of anthropometric measures relative to percentage body fat (%BF) measured by dual‐energy X‐ray absorptiometry in children.</p> </sec> <sec id="oby20689-sec-0003" sec-type="section"> <title>Methods</title> <p>Data from 8 to 19‐year‐old U.S. children enrolled in a nationally representative cross‐sectional survey in 2001‐2004 (<italic>n</italic> = 5, 355) with measured %BF, body mass index (BMI), waist circumference (WC), waist‐to‐height ratio (WHtR), and triceps skinfold thickness (TSF) were used. Agreement and prediction were evaluated based on standardized regression coefficients (<italic>β</italic>), kappa, and the area under the receiver‐operating characteristic curves (AUC).</p> </sec> <sec id="oby20689-sec-0004" sec-type="section"> <title>Results</title> <p>The association between <italic>Z‐</italic>scores for %BF and anthropometric measures was strong (<italic>β</italic> of ∼0.75‐0.90, kappa of ∼0.60‐0.75, and AUC of ∼0.87‐0.98; <italic>P <</italic> 0.001 for all), with only some variations by race–ethnicity, mostly in girls. In boys, TSF and WHtR <italic>Z</italic>‐scores had stronger agreement with %BF than BMI (<italic>β</italic> of 0.91 and 0.86 vs. 0.79, kappa of 0.75 and 0.71 vs. 0.59, and AUC of 0.97 and 0.97 vs. 0.91; <italic>P <</italic> 0.05 for all). In boys with BMI < median but %BF ≥ median, <italic>β</italic> value of TSF <italic>Z‐</italic>score was higher than those from BMI. In girls, TSF also provided a higher agreement than BMI, but was only statistically higher for kappa.</p> </sec> <sec id="oby20689-sec-0005" sec-type="section"> <title>Conclusions</title> <p>High agreement and small racial–ethnic variations in the association between %BF and anthropometric measures support the use of anthropometric measures, especially WHtR and TSF, as proxy indicators for adiposity.</p> </sec> </abstract>