Williams D P, Going S B, Milliken L A, Hall M C, Lohman T G
Stanford Center for Research in Disease Prevention, Palo Alto, CA 94304, USA.
Med Sci Sports Exerc. 1995 May;27(5):776-83.
The purpose of this study was to compare the relationships of anthropometric, bioelectrical impedance analysis (BIA), and near infrared interactance (NIR) measurements with a multiple-component (MC) criterion estimate of body composition derived from body density (D), body water (W), and bone mineral (B) in 48 white adults aged 49-80 yr. Relative errors of predicting the MC criterion from the practical measurements were determined by simple regressions within gender and calculated as the SEE divided by the criterion mean and expressed as a percentage. Relative errors were lowest for the BIA variable, height2/resistance (4.8-5.0%), higher for body mass index and the sum of 10 skinfold thicknesses (7.0-14.5%), and highest for NIR-derived optical density readings at the biceps and the sum of 10 sites (10.8-15.8%). Due to the low relative prediction error for height2/resistance, sex-specific BIA formulas for estimating fat-free mass from D, W, and B (FFM-DWB) were developed. The SEEs for predicting FFM-DWB from BIA, weight, and age were both 1.5 kg in women and men. Because BIA is not limited to ambulatory subjects, it is concluded that BIA may be a particularly useful, practical technique for estimating body composition in older adults.
本研究的目的是比较48名年龄在49至80岁的白人成年人的人体测量学、生物电阻抗分析（BIA）和近红外相互作用（NIR）测量值与基于身体密度（D）、身体水分（W）和骨矿物质（B）得出的多成分（MC）身体成分标准估计值之间的关系。通过性别内的简单回归确定从实际测量值预测MC标准的相对误差，并计算为估计标准误（SEE）除以标准均值并以百分比表示。BIA变量身高²/电阻的相对误差最低（4.8 - 5.0%），体重指数和10处皮褶厚度之和的相对误差较高（7.0 - 14.5%），二头肌处近红外衍生光密度读数以及10个部位之和的相对误差最高（10.8 - 15.8%）。由于身高²/电阻的相对预测误差较低，因此开发了根据D、W和B（无脂肪质量 - DWB）估计无脂肪质量的性别特异性BIA公式。女性和男性从BIA、体重和年龄预测无脂肪质量 - DWB的估计标准误均为1.5千克。由于BIA不限于可走动的受试者，得出的结论是，BIA可能是一种特别有用且实用的技术，用于估计老年人的身体成分。
