Applications of bioelectrical impedance analysis for body composition to epidemiologic studies
Applications of bioelectrical impedance analysis for body composition to epidemiologic studies
复制标题
DOI：
10.1093/ajcn/64.3.459s
复制
发表时间：
1996-01-01
影响因子：
7.1
通讯作者：
Roubenoff, Ronenn
中科院分区：
文献类型：
--
作者：
Roubenoff, Ronenn
生物电阻抗分析（BIA）是一种很有前途的工具，在大规模人群研究中评估身体成分，因为它快速，廉价，不需要大量的操作人员培训或交叉验证。BIA测量的电阻和电抗与身体成分之间关系的经验性质导致了将原始数据转换为身体水升或公斤无脂质量（FFM）或脂肪质量的方程式的发展。如果一个人群在身体组成的重要决定因素（如年龄、肥胖和疾病）上存在显著差异，那么这些方程可能不容易从一个人群转移到另一个人群。我回顾了弗雷明汉心脏研究最近的两项研究，其中BIA首先与双能x射线吸收仪（DXA）作为验证技术进行比较，然后与体重指数（BMI，单位为kg/m-2）进行比较，作为身体脂肪的另一种估计。BIA是dxa衍生FFM的良好预测因子（r = 0.85-0.88, P < 0.001），并且优于BMI作为体脂的估计因子。
Bioelectrical impedance analysis (BIA) is a promising tool in the evaluation of body composition in large population studies because it is fast, is inexpensive, and does not require extensive operator training or cross-validation. The empiric nature of the relation between resistance and reactance measured by BIA and body composition has led to the development of equations that translate the raw data into liters of body water or kilograms of fat-free mass (FFM) or fat mass. These equations may not be easily transferred from one population to another if the populations differ significantly in important determinants of body composition such as age, obesity, and illness. I review two recent studies from the Framingham Heart Study in which BIA was first compared with dual-energy X-ray absorptiometry (DXA) as a validation technique, and then compared with the body mass index (BMI, in kg/m-2) as an alternative estimate of body fat. BIA was a good predictor of DXA-derived FFM (r = 0.85-0.88, P lt 0.001) and was superior to BMI as an estimator of body fat.