Abstract：
The early identification of modifiable risk factors and their monitoring, also within school physical education (PE) classes, are becoming indispensable in the context of public health. The aim of this study was to test whether making use of waist circumference (WC) measurements increases the possibility of predicting the results of cardiorespiratory fitness (CRF) in school-age children, as compared with body mass index (BMI) and other somatic indicators related to body fat. The cross-sectional study covered 190 children aged 10 to 15 years, participating in school PE classes. Body height (BH), body weight (BW), WC, hip circumference (HC) and percentage of body fat (BF%) were measured. BMI, waist to hip ratio (WHR) and waist to height ratio (WHtR) were calculated, and a CRF test was performed by means of a 20 m shuttle run test (20mSRT). The peak heart rate (HRpeak) of the children was also measured. The regression model that was developed showed that WC (R2 = 47.1%), beyond BF% (R2 = 50.3%) and WHtR (R2 = 50.0%), was a useful measure of CRF, and stronger than BMI (R2 = 45.8%) or WHR (R2 = 39.2%). The risk of obtaining the CRF result classified below a good level (below the percentile range of P60-P80) was significantly higher in children with a larger WC (odds ratio (OR) for the WC change of 1 cm equals 1.14 (95% CI: 1.09-1.20; p < 0.001)). The simplicity of measuring WC and the possibility of using this measurement in the calculation of WHtR with reference to CRF indicate its usefulness in the prophylactic exams of school children.
摘要：
可改变的危险因素的早期识别和监测，也在学校体育课中，在公共卫生的背景下变得不可或缺。这项研究的目的是测试使用腰围（WC）测量是否增加了预测学龄儿童心肺健康（CRF）结果的可能性。与体重指数（BMI）和其他与体脂相关的身体指标相比。这项横断面研究涵盖了190名10至15岁的儿童，参加学校体育课。车身高度(BH),体重(BW),WC,测量臀围（HC）和体脂百分比（BF％）。BMI,计算腰臀比(WHR)和腰高比(WHtR),CRF测试通过20m穿梭运行测试(20mSRT)进行。还测量了儿童的峰值心率（HRpeak）。建立的回归模型表明，WC(R2=47.1%)，超过BF%(R2=50.3%)和WHTR(R2=50.0%)，是通用报告格式的有用衡量标准，且强于BMI(R2=45.8%)或WHR(R2=39.2%)。WC较大的儿童获得CRF结果低于良好水平（低于P60-P80的百分位数范围）的风险明显更高（WC变化为1cm的比值比（OR）等于1.14（95％CI：1.09-1.20;p＆lt;0.001）。测量WC的简单性以及在参考CRF计算WHtR时使用该测量的可能性表明其在学童的预防性检查中很有用。
