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Evaluation of Accuracy of the Body Composition Measurements by the BIA Method

机译：用BIA方法评估人体成分的准确性

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Purpose. The main purpose of this study is to verify the accuracy of body composition measurements by the BIA method, using TANITA 418 MA unit. Basic procedures. For purposes of our study we decided to use the type-A uncertainty evaluation method (statistical processing of measured data). To formulate diagnostic error for the BIA method we used typical (standard) error of measurement from differences between pairs of repeated measurements - which is in principle a mean error of the test. The research was carried out on a group of 10 students whose field of study is physical education and sport. These students were chosen from the total number of 74 students in such a way that they represent as wide range of fat fraction as possible. Representation of their fat fraction oscillated between 9.0 to 31.2% of body fat. Input value of body fat, which was the basic criterion for selection of students to the measurement etalon, was determined by the DEXA method. Main findings. We described the uncertainty (type A) in selected file of etalons by an average value and by a standard deviation in percentage of fat: 0.13 ± 0.05. A diagnostic error of the method expressed by means of typical (standard) error of measurement was 0.38% of body fat. Conclusion. Considering the detected values of uncertainty (type A) and of typical error of measurement, we can conclude that measurement of body composition by the BIA method using TANITA 418 MA unit is sufficiently accurate for requirements of practical use. The necessary condition for the above mentioned measurement accuracy is a strict observance of standard measurement conditions.
机译：目的。这项研究的主要目的是使用TANITA 418 MA装置通过BIA方法验证人体成分测量的准确性。基本程序。为了我们的研究目的，我们决定使用A型不确定性评估方法（对测量数据进行统计处理）。为了为BIA方法制定诊断误差，我们使用了重复测量对之间的差异的典型（标准）测量误差-原则上这是测试的平均误差。该研究是针对一组10名学生而进行的，他们的研究领域是体育和运动。这些学生是从74名学生中选出的，他们所代表的脂肪含量范围尽可能广泛。他们的脂肪比例在人体脂肪的9.0％到31.2％之间波动。通过DEXA方法确定身体脂肪的输入值，这是选择测量标准具的学生的基本标准。主要发现。我们通过平均值和脂肪百分比的标准偏差（0.13±0.05）来描述标准具的选定文件中的不确定度（A型）。通过典型（标准）测量误差表示的该方法的诊断误差为体内脂肪的0.38％。结论。考虑到不确定性（A型）的检测值和典型的测量误差，我们可以得出结论，使用TANITA 418 MA装置通过BIA方法进行身体成分测量对于实际应用而言足够准确。上述测量精度的必要条件是严格遵守标准测量条件。

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