Measurement agreement in percent body fat estimates among laboratory and field assessments in college students: Use of equivalence testing
Measurement agreement in percent body fat estimates among laboratory and field assessments in college students: Use of equivalence testing
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DOI：
10.1371/journal.pone.0214029
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发表时间：
2019-03-20
期刊：
影响因子：
3.7
通讯作者：
Constantino, Nora
中科院分区：
文献类型：
--
作者：
Burns, Ryan D.;Fu, You;Constantino, Nora
本研究的目的是检查7个实验室和现场评估中的体脂百分比估计值与使用等效性检验的双发射X线吸收测定法之间的一致性。参与者是437名大学生（平均年龄= 19.2 +/- 0.6岁）。双发射X射线吸收法被用作标准，流体静力学称重，皮褶厚度，空气置换体积描记法，近红外电抗，和三种方法的生物电阻抗分析检查作为替代评估。使用组内相关系数检查相对一致性。使用等效性检验检查组水平一致性。使用平均绝对误差百分比和Bland-Altman图评估个体水平一致性。单次测量组内相关系数评分范围为0.71-0.80。液体静力称重、皮褶厚度、排气体积描记法和4电极生物电阻抗分析显示，使用10%等效区间与标准具有统计学等效性，绝对平均差异范围为1.0%-4.9%体脂。平均绝对百分比误差范围为11.7%（皮褶厚度）至21.9%（Omron（手持式）生物电阻抗分析）。与双发射X线吸收测定法相比，在平均评分范围内，一致性限度是异方差的，在较高的体脂百分比水平下观察到更大的平均差异。在一个大学生样本中，流体静力称重、皮褶厚度、排气体积描记法和4电极生物电阻抗分析显示了与双发射X射线吸收法统计等效的强有力证据。
The purpose of this study was to examine the agreement in percent body fat estimates among 7 laboratory and field assessments against dual-emission x-ray absorptiometry using equivalence testing. Participants were 437 college students (mean age = 19.2 +/- 0.6 years). Dual-emission x-ray absorptiometry was used as the criterion with hydrostatic weighing, skinfold thickness, air displacement plethysmography, near infrared reactance, and three methods of bioelectrical impedance analysis examined as surrogate assessments. Relative agreement was examined using intraclass correlation coefficients. Group level agreement was examined using equivalence testing. Individual-level agreement was assessed using Mean Absolute Percent Error and Bland-Altman Plots. Single measure intraclass correlation coefficient scores ranged from 0.71-0.80. Hydrostatic weighing, skin-fold thickness, air displacement plethysmography, and 4-electrode bioelectrical impedance analysis showed statistical equivalence with the criterion using a 10% Equivalence Interval with absolute mean differences ranging from 1.0%-4.9% body fat. Mean Absolute Percent Error ranged from 11.7% using skinfold thickness to 21.9% using Omron (hand-held) bioelectrical impedance analysis. Limits of Agreement were heteroscedastic across the range of mean scores compared to dual-emission x-ray absorptiometry, with greater mean differences observed at higher levels of percent body fat. Hydrostatic weighing, skinfold thickness, air displacement plethysmography, and 4-electrode bioelectrical impedance analysis showed strong evidence for statistical equivalence with dual-emission x-ray absorptiometry in a sample of college students.