Mak Kwok Kei, Ho Sai Yin, Lo Wing Sze, Thomas Neil G, McManus Alison M, Lam Tai Hing
Department of Community Medicine and School Public Health, The University of Hong Kong, Hong Kong.
Int J Pediatr Obes. 2010 Oct;5(5):390-5. doi: 10.3109/17477161003728451.
To examine the percentile distribution of waist-to-stature ratio (WSR) and derive WSR cut-offs for underweight, normal weight, and overweight based on the International Obesity Task Force (IOTF) and local weight-for-height standards in Hong Kong Chinese adolescents.
In the Hong Kong Student Obesity Surveillance project in 2006-2007, height, weight and waist circumference of 13 568 (40.3% boys) Chinese adolescents aged 12-18 were measured. Smoothed percentile distributions of WSR by age and sex were examined using Lambda-Mu-Sigma (LMS) regression. The sex- and age-specific WSR values corresponding to underweight and overweight, as defined by the IOTF and local weight-for-height standards, were determined using receiver operating characteristic curves.
The percentile values of WSR were stable across age in both sexes. In general, WSR values of 0.40 and 0.46 corresponded to underweight and overweight, respectively, as defined by both IOTF and local weight-for-height standards. As a reference for normal weight status, the median weight-for-height values corresponded to a WSR value of 0.42 in most sex-age subgroups.
Sex and age independent WSR cut-off values for underweight, median weight and overweight in Hong Kong adolescents were identified. WSR is potentially a practical indicator for adolescents to monitor their weight status.
研究腰围身高比（WSR）的百分位数分布，并根据国际肥胖特别工作组（IOTF）和香港中国青少年的本地身高体重标准得出体重过轻、正常体重和超重的WSR临界值。
在2006 - 2007年香港学生肥胖监测项目中，测量了13568名12 - 18岁中国青少年（40.3%为男孩）的身高、体重和腰围。使用拉姆达-缪-西格玛（LMS）回归分析按年龄和性别划分的WSR平滑百分位数分布。通过受试者工作特征曲线确定IOTF和本地身高体重标准所定义的体重过轻和超重对应的性别和年龄特异性WSR值。
WSR的百分位数在男女各年龄组中均保持稳定。总体而言，IOTF和本地身高体重标准所定义的体重过轻和超重对应的WSR值分别为0.40和0.46。作为正常体重状态的参考，大多数性别年龄亚组中身高体重中位数对应的WSR值为0.42。
确定了香港青少年体重过轻、中等体重和超重的与性别和年龄无关的WSR临界值。WSR可能是青少年监测自身体重状况的一个实用指标。
