超声与双能X线吸收法在评估大学生体脂百分比中的一致性
Agreement between ultrasound and dual-energy X-ray absorptiometry in assessing percentage body fat in college-aged adults.
作者信息
Johnson Kelly E, Miller Brian, Juvancic-Heltzel Judith A, Agnor Sarah E, Kiger Dana L, Kappler Rachele M, Otterstetter Ronald
机构信息
Department of Sport Science and Wellness Education, The University of Akron, Akron, OH, USA; Department of Health Exercise and Sports Sciences, University of New Mexico, Albuquerque, NM, USA.
出版信息
Clin Physiol Funct Imaging. 2014 Nov;34(6):493-6. doi: 10.1111/cpf.12150. Epub 2014 Apr 4.
BACKGROUND
The BodyMetrix(®) BX-2000 Ultrasound device (ULTRA) shows prowess in being an effective alternative to the expense and technicality of dual-energy X-ray absorptiometry (DXA). However, this technique has not been investigated using a seven-site methodology.
SUBJECT/OBJECTIVE: To employ a cross-over design to investigate the agreement between ULTRA using a seven-site methodology and DXA in assessing body fat (%BF) in a normal-weight sample of college-age men and women.
METHODS
Subjects (n = 84, BMI = 23.6 ± 3.6 kg m(-²), age = 23.0 ± 4.7 years) participated in this study with %BF measurements following the manufacturer's specifications.
RESULTS
Significant differences were observed between methods with ULTRA less than DXA (difference = 4.4 ± 0.8%, t-statistic = 7.27, P<0.001) with no difference between men and women.
CONCLUSION
The current study showed that ULTRA using a seven-site methodology did not agree with DXA in measuring %BF. Thus, this investigational ULTRA methodology might not be appropriate in estimating %BF in this population.
背景
BodyMetrix(®) BX - 2000超声设备（ULTRA）在成为双能X线吸收法（DXA）昂贵费用和技术复杂性的有效替代方法方面表现出色。然而，该技术尚未采用七点法进行研究。
研究对象/目的：采用交叉设计，研究在正常体重的大学生男女样本中，使用七点法的ULTRA与DXA在评估体脂百分比（%BF）方面的一致性。
方法
受试者（n = 84，体重指数 = 23.6 ± 3.6 kg·m⁻²，年龄 = 23.0 ± 4.7岁）参与本研究，按照制造商的规格测量%BF。
结果
两种方法之间观察到显著差异，ULTRA测量值低于DXA（差异 = 4.4 ± 0.8%，t统计量 = 7.27，P < 0.001），男性和女性之间无差异。
结论
当前研究表明，使用七点法的ULTRA在测量%BF方面与DXA不一致。因此，这种研究性的ULTRA方法可能不适用于估计该人群的%BF。
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