PREDICTIVE ACCURACY OF BIOELECTRICAL-IMPEDANCE IN ESTIMATING BODY-COMPOSITION OF NATIVE-AMERICAN WOMEN
PREDICTIVE ACCURACY OF BIOELECTRICAL-IMPEDANCE IN ESTIMATING BODY-COMPOSITION OF NATIVE-AMERICAN WOMEN
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DOI：
10.1093/ajcn/59.5.964
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发表时间：
1994-05-01
影响因子：
7.1
通讯作者：
BAUMGARTNER, RN
中科院分区：
文献类型：
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作者：
STOLARCZYK, LM;HEYWARD, VH;BAUMGARTNER, RN
研究了基于双组分（2C）和多组分（MC）模型估算标准无脂质量（FFM）的种族特异性和脂肪特异性生物电阻抗分析（BIA）方程的预测准确性。用静水称量法测定了年龄在18-60岁的美洲原住民女性（n = 151）的体密度（Db）。采用双能x线吸收法测定总骨灰量。Rising(5)、Segal(3)和Gray(4)方程与FFM（2C）的交叉验证得到了高相关系数（0.86-0.95）和可接受的see （1.47-2.72 kg）。根据标准FFM（MC）对这些方程进行交叉验证，并根据体内总矿物质调整Db，得出相似的相关系数（0.82-0.94）和see （1.69-2.80 kg）。然而，每个BIA方程都显著高估了FFM（MC）。基于MC模型建立了新的种族BIA方程：FFM(MC) = 0.001254(HT2) - 0.04904(R) +0.1555(WT) + 0.1417(X(C)) - 0.0833(AGE) + 20.05 （R = 0.864, SEE = 2.63 kg）。
The predictive accuracy of race-specific and fatness-specific bioelectrical impedance analysis (BIA) equations for estimating criterion fat-free mass (FFM) derived from two-component (2C) and multicomponent (MC) models was examined. Body density (Db) of Native American women (n = 151) aged 18-60 y was measured by hydrostatic weighing at residual volume. Total body bone ash was obtained by dual-energy, xray absorptiometry. Cross-validation of the Rising (5), Segal (3), and Gray (4) equations against FFM(2C) yielded high correlation coefficients (0.86-0.95) and acceptable SEEs (1.47-2.72 kg). Cross-validation of these equations against criterion FFM(MC), with Db adjusted for total body mineral, yielded similar correlation coefficients (0.82-0.94) and SEEs (1.69-2.80 kg). However, each BIA equation significantly overestimated FFM(MC). A new race-specific BIA equation based on an MC model was developed: FFM(MC) = 0.001254(HT2) - 0.04904(R) +0.1555(WT) + 0.1417(X(C)) - 0.0833(AGE) + 20.05 (R = 0.864, and SEE = 2.63 kg).