Barrera M G, Salazar G, Gajardo H, Gattás V, Coward A
Unidad de Nutrición Clínica, Universidad de Chile, Santiago, Chile.
Rev Med Chil. 1997 Nov;125(11):1335-42.
The degree of agreement between different methods to assess total body composition is not well known.
To determine the level of agreement for total body fat mass measurement by dual-photon absorptiometry (DEXA), bioelectrical impedance (BIA) and anthropometry using the deuterium dilution method as the gold-standard technique, in normal male volunteers.
Total body fat mass was measured by DEXA, BIA, anthropometry and deuterium dilution in thirty one healthy men, aged 41.9 +/- 8.6 years old.
Mean differences in percentage of total body fat compared with deuterium dilution were 0.3% +/- 2.2, 1.3% +/- 3.4 and 1.8 +/- 2.3% for DEXA1 BIA and anthropometry respectively. DEXA had the lower difference with deuterium dilution and the confidence intervals for this difference (+/- DS) showed that, at the individual level, the maximum difference was 4.4%.
All the methods evaluated gave similar average measurements for total body fat mass, but with different individual variability. In this group of healthy male subjects, DEXA was the best method in terms of agreement with the gold-standard.
不同方法评估全身成分之间的一致性程度尚不清楚。
在正常男性志愿者中，以氘稀释法作为金标准技术，确定通过双能X线吸收法（DEXA）、生物电阻抗法（BIA）和人体测量法测量全身脂肪量的一致性水平。
对31名年龄为41.9±8.6岁的健康男性，采用DEXA、BIA、人体测量法和氘稀释法测量全身脂肪量。
与氘稀释法相比，DEXA、BIA和人体测量法测量的全身脂肪百分比平均差异分别为0.3%±2.2、1.3%±3.4和1.8±2.3%。DEXA与氘稀释法的差异最小，该差异的置信区间（±DS）表明，在个体水平上，最大差异为4.4%。
所有评估方法对全身脂肪量的平均测量结果相似，但个体变异性不同。在这组健康男性受试者中，就与金标准的一致性而言，DEXA是最佳方法。
