学龄前儿童颈围与体重指数的相关性

Correlation of neck circumference with body mass index in preschool children

目的 探讨学龄前儿童颈围与体重指数的相关性及颈围对学龄前儿童超重/肥胖的诊断价值。方法 采用分层整群抽样的方法抽取乌鲁木齐市10所幼儿园3 719名7岁以下儿童,收集儿童一般资料并进行体格测量,采用Pearson相关分析法评估颈围与体重指数的相关性,采用受试者工作特征(receiver operating characteristic,ROC)曲线分析颈围判断超重/肥胖的准确性,采用Kappa一致性检验评价颈围与体重指数判断超重/肥胖的一致性。结果 各年龄阶段的男童、女童颈围与体重指数均呈正相关(r≥0.50,均P<0.001)。以体重指数作为判断超重/肥胖的标准分为超重/肥胖组与非超重/肥胖组,各年龄阶段的超重/肥胖组颈围均大于非超重/肥胖组(P<0.001)。ROC曲线分析显示,男童和女童颈围判断超重/肥胖的曲线下面积均大于0.7。Kappa一致性检验显示,各年龄阶段男童、女童的颈围和体重指数判断超重/肥胖的Kappa值均大于0.40。结论 学龄前儿童颈围与体重指数呈正相关;颈围可较好地判断学龄前儿童超重/肥胖。

Objective To study the correlation between neck circumference and body mass index and the value of neck circumference in identifying overweight and obesity in preschool children. Methods The stratified cluster sampling method was used to recruit 3 719 children under 7 years from 10 kindergartens in Urumqi, China. General data were collected, and physical measurements were performed. A Pearson correlation analysis was used to evaluate the correlation between neck circumference and body mass index. The receiver operating characteristic(ROC) curve was used to assess the accuracy of neck circumference in identifying overweight/obesity. The Kappa consistency test was used to assess the consistency of neck circumference and body mass index in identifying overweight/obesity. Results There was a positive correlation between neck circumference and body mass index in boys and girls of all ages(r≥0.50, P<0.001). According to body mass index as the criteria for overweight/obesity, the children were divided into an overweight/obesity group and a non-overweight/obesity group, and the analysis showed that the overweight/obesity group had a significantly larger neck circumference than the non-overweight/obesity group(P<0.001). The ROC curve analysis showed that neck circumference had an area under the ROC curve of >0.7 in identifying overweight/obesity for boys and girls. The Kappa consistency test showed that the neck circumference and body mass index had a Kappa value of >0.40 in identifying overweight/obesity in boys and girls of all ages. Conclusions Neck circumference is positively correlated to body mass index, and neck circumference can be used to identify overweight/obesity in preschool children.