Kawakami K, Ling Q C, Nakamura N, Ikeda Y, Ohno M
Department of Radiology, Jikei University, School of Medicine, Tokyo.
Rinsho Byori. 1994 Oct;42(10):1088-92.
The accuracy of a bioelectrical impedance analysis (BIA) was examined by comparison with a dual energy X-ray absorptiometry (DXA) to measure the body composition. The subjects consisted of 52 patients (21-78y.) with chronic renal failure (32 cases), osteoporosis (6 cases) and diabetes mellitus with obesity (14 cases). Bioelectrical impedance between hand and leg was measured by a body composition analyzer (Model BIA-BC-3, RJL) with a four-electrode system. One pair of current supply and detector electrode was attached to the right hand and another pair was to the leg. The total fat mass measured by BIA was well correlated with the value by DXA (r = 0.959, p < 0.01). The total fat mass by BIA was also correlated with the fat mass in the arms (r = 0.863), fat mass in the legs (r = 0.911), and fat mass in the trunk (r = 0.920) by DXA. The correlation rates were p < 0.01. These correlation coefficients were lower than the correlation rate of the total fat mass measured by DXA. The total lean mass measured by BIA was well correlated with the value by DXA (r = 0.963, p < 0.01). It was correlated with the lean mass in the arms (r = 0.899), lean mass in the legs (r = 0.929), and lean mass in the trunk (r = 0.906) by DXA, but these values were lower than the correlation rate of the total lean mass obtained by DXA. These findings suggest that BIA is a safe and simple method for analyzing the body composition of the total fat mass and the total lean mass, and total body composition is reflected more clearly than regional body composition.
通过与双能X线吸收法（DXA）比较来检测生物电阻抗分析（BIA）测量身体成分的准确性。研究对象包括52例患者（年龄21 - 78岁），其中慢性肾衰竭患者32例、骨质疏松患者6例、肥胖型糖尿病患者14例。使用四电极系统的身体成分分析仪（型号BIA - BC - 3，RJL）测量手部和腿部之间的生物电阻抗。一对电流供应和检测电极连接到右手，另一对连接到腿部。BIA测量的总脂肪量与DXA测量值高度相关（r = 0.959，p < 0.01）。BIA测量的总脂肪量也与DXA测量的手臂脂肪量（r = 0.863）、腿部脂肪量（r = 0.911）和躯干脂肪量（r = 0.920）相关。相关率为p < 0.01。这些相关系数低于DXA测量的总脂肪量的相关率。BIA测量的总瘦体重与DXA测量值高度相关（r = 0.963，p < 0.01）。它与DXA测量的手臂瘦体重（r = 0.899）、腿部瘦体重（r = 0.929）和躯干瘦体重（r = 0.906）相关，但这些值低于DXA获得的总瘦体重的相关率。这些结果表明，BIA是一种安全、简单的分析总脂肪量和总瘦体重身体成分的方法，并且全身成分比局部身体成分反映得更清晰。
