多频生物电阻分析的可靠性,生物变异性和准确性,用于测量身体组成元件的生物电阻分析
David P Looney1,2,3, Erica A Schafer1,4, Christopher L Chapman1,4
1United States Army Research Institute of Environmental Medicine (USARIEM), Natick, MA, United States.
Frontiers in nutrition
|December 18, 2024
概括
多频生物电阻分析 (MF-BIA) 系统在健康成年人的身体组成测量方面表现出高可靠性. InBody 770显示一致的结果,支持其在研究和军事应用中的使用.
科学领域:
- 身体生理学 身体生理学
- 生物医学工程 生物医学工程
- 身体组成分析 身体成分分析
背景情况:
- 生物电阻分析 (BIA) 系统越来越多地被用于研究和健康评估,这是由于技术进步,可负担性和易用性.
- 多频BIA (MF-BIA) 为准确性和精度提供了潜在的改进,特别是通过八极接触进行细分分析.
研究的目的:
- 通过商业可用的多频BIA系统 (InBody 770) 评估成分测量 (总体水量,质量和组成) 的可靠性,生物变异性和准确性.
主要方法:
- 在受控条件下,十四名健康成年人在三周内进行了重复的MF-BIA评估.
- 系统性错误 (测试重复测试可靠性) 和生物可变性 (日复一日可靠性) 通过使用类内相关系数 (ICC) 进行评估.
- 将MF-BIA身体组成测量的精度与双能X射线吸收度 (DXA) 进行了比较.
主要成果:
- 观察到全身水和质量的测试可靠性非常高 (ICC ≥0.999),区域测量可靠性很高 (ICC 0.973-1.000).
- 观察到微小的生物变异性,与当天测量相比,身体水和质量的日比日差异略高.
- 与DXA相比,MF-BIA显示体脂%偏差为-4.0%,过度预测的无脂肪质量为2.8公斤,预测不足的脂肪质量为-2.9公斤.
结论:
- InBody 770 MF-BIA 系统在健康个体中表现出高方法可靠性和稳定的日常测量主要的身体组成成分.
- 与标准方法相比,一致的~3%的身体脂肪偏移得到证实.
- InBody 770的精度和一致性支持其作为军事标准方法的潜力,以及其适用于广泛的身体脂肪百分比.
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