Department of Family Medicine, Seoul National University Hospital, Seoul, Korea.
G Clinic, Seoul, Korea.
J Korean Med Sci. 2018 Feb 12;33(7):e47. doi: 10.3346/jkms.2018.33.e47.
Non-communicable diseases (NCDs) are an important issue worldwide. Obesity has a close relationship with NCDs. Various age-related changes should be considered when evaluating obesity.
National representative cohort data from the National Health Insurance Service National Sample Cohort from 2012 to 2013 were used. Sex-specific and age group-specific (10-year intervals) means for body mass index (BMI), waist circumference (WC), and waist-to-height ratio (WtHR) were calculated. Optimal cut-points for obesity parameters were defined as the value predicting two or more components of metabolic syndrome (except WC).
The mean value and optimal cut-point for BMI decreased with age for men. The mean BMI value for women increased with age, but optimal cut-points showed no remarkable difference. The mean WC of men increased with age, but the optimal cut-points were similar for age groups. For women, the mean value and optimal cut-point for WC increased with age. Regarding WtHR, the mean value and optimal cut-point increased with age for men and women. Differences across age groups were larger for women.
The mean values of the obesity indices and the optimal cut-points were changed according to age groups. This study supports the necessity of applying age group-specific cut-points for the various obesity parameters.
非传染性疾病（NCDs）是全球的一个重要问题。肥胖与 NCDs 密切相关。评估肥胖时应考虑各种与年龄相关的变化。
使用了 2012 年至 2013 年国家健康保险服务国家样本队列的全国代表性队列数据。计算了性别特异性和年龄组特异性（每 10 年为一个间隔）的体质指数（BMI）、腰围（WC）和腰高比（WtHR）平均值。肥胖参数的最佳切点定义为预测代谢综合征两个或多个成分（WC 除外）的数值。
男性 BMI 的平均值和最佳切点随年龄的增长而降低。女性的 BMI 平均值随年龄的增长而增加，但最佳切点没有明显差异。男性的 WC 平均值随年龄的增长而增加，但各年龄组的最佳切点相似。对于女性，WC 的平均值和最佳切点随年龄的增长而增加。对于 WtHR，男性和女性的平均值和最佳切点随年龄的增长而增加。女性的年龄组间差异较大。
肥胖指数的平均值和最佳切点根据年龄组发生了变化。本研究支持为各种肥胖参数应用年龄组特异性切点的必要性。
