Park Saejong, Chung Dong-Sik, Ko Byoung-Goo, Song Hong-Sun, Kim Kwang Jun, Chung Jin-Wook, Lee Seunghee, Kim Chul-Hyun, Nam Younshin, Shin Seungyun, Lee Hyo, Chung Sochung, Ahn Hong-Yup, Oh Jeong Hun, So Wi-Young
Department of Sports Sciences, Korea Institute of Sport Science, Seoul, Korea.
Department of Sports Culture, Dongguk University, Seoul, Korea.
Iran J Public Health. 2019 Jan;48(1):69-76.
This study aimed to identify percent body fat cut-off points related to metabolic syndrome in a large sample of Korean adolescents.
The subjects (n=2120; boys=1107, girls=1013) were middle and high school students aged 12-17 yr who participated in the Korean National Fitness Award Project in 2013. Percent body fat was estimated via eight-polar bioelectrical impedance analysis. Metabolic syndrome was classified using established standards based on the National Cholesterol Education Program with the definition modified for age. Age- and sex-specific percent body fat z-scores were calculated for every adolescent using skewness, median, and coefficient of variation curves to account for growth and development. Receiver operating characteristic curve analysis was used to identify the percent body fat cut-off points using percent body fat z-scores from skewness, median, and coefficient of variation curves as the test and metabolic syndrome as the criterion.
Based on the modified National Cholesterol Education Program criteria for metabolic syndrome, the areas under the receiver operating characteristic curve for percent body fat were 0.882 and 0.893 for boys and girls, respectively. The percent body fat percentiles were 82.2 and 87.3 for boys and girls, respectively. According to the skewness, median, and coefficient of variation curves, the percent body fat cut-off points based on the modified National Cholesterol Education Program criteria were 23.6%-25.7% for boys and 32.8%-37.3% for girls, both aged 12-17 yr. Age- and sex-specific percent body fat cut-off points were identified in relation to the metabolic syndrome status of Korean adolescents.
These percent body fat cut-offs might be useful for identifying metabolic abnormality due to obesity in Korean adolescents.
本研究旨在确定韩国大量青少年样本中与代谢综合征相关的体脂百分比切点。
研究对象（n = 2120；男孩 = 1107，女孩 = 1013）为2013年参加韩国国家健身奖项目的12至17岁的初高中学生。通过八电极生物电阻抗分析估算体脂百分比。根据美国国家胆固醇教育计划既定标准对代谢综合征进行分类，并针对年龄进行了定义修改。利用偏度、中位数和变异系数曲线计算每个青少年的年龄和性别特异性体脂百分比z分数，以考虑生长发育情况。采用受试者工作特征曲线分析，以偏度、中位数和变异系数曲线的体脂百分比z分数为检验指标，代谢综合征为标准，确定体脂百分比切点。
根据修改后的美国国家胆固醇教育计划代谢综合征标准，男孩和女孩体脂百分比的受试者工作特征曲线下面积分别为0.882和0.893。男孩和女孩的体脂百分比百分位数分别为82.2和87.3。根据偏度、中位数和变异系数曲线，基于修改后的美国国家胆固醇教育计划标准，12至17岁男孩的体脂百分比切点为23.6% - 25.7%，女孩为32.8% - 37.3%。确定了与韩国青少年代谢综合征状态相关的年龄和性别特异性体脂百分比切点。
这些体脂百分比切点可能有助于识别韩国青少年因肥胖导致的代谢异常。
