Assessing Body Composition of Children and Adolescents Using Dual-Energy X-Ray Absorptiometry,Skinfolds, and Electrical Impedance |
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| Authors: | Angela Mooney Laurel Kelsey Gilbert W Fellingham James D George Ron L Hager J William Myrer |
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| Institution: | 1. Department of Exercise Sciences , Brigham Young University , Provo, Utah;2. Department of Statistics , Brigham Young University , Provo, Utah |
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| Abstract: | To determine the validity and reliability of percent body fat estimates in 177 boys and 154 girls between 12–17 years of age, percent body fat was assessed once using dual-energy X-ray absorptiometry and twice using the sum of two skinfolds and three bioelectrical impedance analysis devices. The assessments were repeated on 79 participants on a second day. The agreement between the percent body fat estimates from the four prediction methods and dual-energy X-ray absorptiometry was evaluated using Bland–Altman analyses and a mixed linear model. All methods were reliable within and between days. The sum of two skinfolds (±6.8% body fat), OMRON (OMRON Healthcare Inc., Vernon Hills, Illinois, USA) bioelectrical impedance analysis (0 ± 7.3% body fat), and TANITA 521 (TANITA Corporation, Tokyo, Japan) bioelectrical impedance analysis (±7.6% body fat) had wide prediction intervals and are acceptable for use in large population-based studies. The TANITA 300A bioelectrical impedance analysis is not recommended for use in children and adolescents due to its wide prediction interval (±8.1% body fat) and large bias. A criterion method should be used when the accurate assessment of body composition of an individual is critical. |
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| Keywords: | percent body fat total body fat obesity TANITA OMRON |
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