儿童青少年身体成分评价方法的研究

发布时间：2018-03-31 15:23

本文选题：儿童青少年　切入点：身体成分　出处：《华东师范大学》2016年硕士论文

【摘要】：研究目的：身体成分作为直接反应儿童青少年体质健康的指标受到越来越多研究者的重视,一个准确的身体成分测试方法和评价指标对于鉴别个体是否肥胖或营养不良有着重要意义。当前,世界许多国家和地区所制定的体质健康标准中均包含身体成分的测试,但是不同国家和地区的身体成分测试方法和评价指标并不完全统一。本文通过对比BMI、腰围、腰臀比、皮褶厚度四种测量方法对于预测体脂百分比的准确性,从而找到最适合评价儿童青少年成体成分的方法。研究方法：本研究以7-18岁年龄段的儿童青少年为研究对象,通过分析和探讨了这些儿童青少年的身体组成成分随年龄变化特征,对比常用的四种评价体脂百分比的方法,即BMI、腰围、腰臀比、皮褶厚度,通过分析比较他们各自ROC曲线下的面积、敏感度、特异度,得出四种方法预测体脂百分比的准确性,从而判定哪一种方法更适合评价儿童青少年的体脂百分比。研究结果：(1)在男生中,BMI、腰围、腰臀比皮褶厚度预测体脂百分比的ROC曲线中,ROC曲线下的面积分别为0.820、0.873、0.632、0.835,其中腰围预测体脂百分比的ROC曲线中,ROC曲线下的面积为本研究四种方法中的最大值；(2)在女生中,BMI、腰围、腰臀比皮褶厚度预测体脂百分比的ROC曲线中,ROC曲线下的面积分别为0.958、0.787、0.660、0.669,其中BMI预测体脂百分比的ROC曲线中,ROC曲线下的面积为本研究四种方法中的最大值；(3)预测7-12岁年龄段男生体脂百分比的各种方法的ROC曲线中,腰围测量的方法的ROC曲线下的面积最大,为0.860；预测13-15岁年龄段男生体脂百分比的各种方法的ROC曲线中,BMI测量的方法的ROC曲线下的面积最大,为0.936；预测16-18岁年龄段男生体脂百分比的各种方法的ROC曲线中,腰围测量的方法的ROC曲线下的面积最大,为0.860；预测7-12岁年龄段女生体脂百分比的各种方法的ROC曲线中,BMI测量的方法的ROC曲线下的面积最大,为0.860；预测13-15岁年龄段女生体脂百分比的各种方法的ROC曲线中,皮褶厚度测量的方法的ROC曲线下的面积最大,为0.844；预测16-18岁年龄段女生体脂百分比的各种方法的ROC曲线中,腰围测量的方法的ROC曲线下的面积最大,为0.800。研究结论：(1)就整体而言,对于男生,腰围评价身体成分的效果更好,对于女生,BMI预测身体成分效果更好；(2)就不同年龄段而言,男生7-12岁年龄段腰围预测身体成分效果更好,男生13-15岁年龄段BMI预测身体成分效果更好,男生16-18岁年龄段腰围预测身体成分效果更好；女生7-12岁年龄段BMI预测身体成分效果更好,女生13-15岁年龄段皮褶厚度测量法预测身体成分效果更好,女生16-18岁年龄段腰围预测身体成分效果更好。
[Abstract]:Objective: body composition as a direct indicator of children's and adolescents' physical health has been paid more and more attention by researchers. An accurate body composition test method and evaluation index are of great significance in identifying whether an individual is obese or malnourished. At present, many countries and regions around the world have established physical health standards that include body composition tests. However, the body composition test methods and evaluation indexes in different countries and regions are not uniform. The accuracy of BMI, waist circumference, waist-to-hip ratio, skinfold thickness in predicting body fat percentage is compared in this paper. So as to find the most suitable method for evaluating adult components of children and adolescents. By analyzing and discussing the changes of body composition with age in these children and adolescents, we compared the four commonly used methods to evaluate the percentage of body fat, that is, BMI, waist circumference, waist-hip ratio, skinfold thickness, and so on. By analyzing and comparing the area, sensitivity and specificity of their respective ROC curves, the accuracy of four methods for predicting the percentage of body fat was obtained. So as to determine which method is more suitable for evaluating the percentage of body fat of children and adolescents. In the ROC curve of waist-hip ratio skinfold thickness to predict the percentage of body fat, the area under the curve was 0.820 / 0.873n / 0.632n / 0.835, respectively. The area under the ROC curve of waist circumference predicting the percentage of body fat was the maximum value of the four methods in this study. The area under the ROC curve of skinfold thickness to predict the percentage of body fat is 0.958 / 0.787 / 0.660 / 0.669respectively. The area under the ROC curve of BMI predicting the percentage of body fat is the maximum value of the four methods in this study. In the ROC curve of various methods of body fat percentage for boys in age group, The area under the ROC curve of waist circumference measurement method was the largest (0.860). The area under the ROC curve was the largest in the ROC curve of various methods for predicting the percentage of body fat in boys aged 13-15 years. Among the ROC curves for predicting the percentage of body fat in boys aged 16 to 18, the area under the ROC curve of waist circumference measurement was the largest. The area under the ROC curve of the method for predicting the percentage of body fat of girls aged 7-12 years was the largest (0.860); the ROC curve of various methods for predicting the percentage of body fat of girls aged 13 to 15 years was 0.860; the ROC curve of the various methods for predicting the percentage of body fat in girls aged 13 to 15 years was the largest under the ROC curve. The area under the ROC curve of the skinfold thickness measurement method was the largest (0.844). The area under the ROC curve of waist circumference measurement was the largest among the ROC curves of various methods for predicting the percentage of body fat in girls aged 16-18. The study concluded that: 1) on the whole, for boys, waist circumference is better for evaluating body composition, and for girls, BMI is better for predicting body composition. (2) for different age groups, the waist circumference of boys aged 7 to 12 is more effective in predicting body composition. Boys aged 13-15 years old BMI predict body composition better, boys 16-18 years old waist circumference predict body composition effect better, girls 7-12 years old BMI predict body composition effect better, The effect of skinfold thickness measurement for girls aged 13-15 years was better than that for girls aged 16-18 years.
【学位授予单位】：华东师范大学
【学位级别】：硕士
【学位授予年份】：2016
【分类号】：G804.49

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