中文摘要：

目的了解体质量指数（BMI）标准和新建腰围界值点在参照人群中筛查超重、肥胖的有效性,为建立合适的腰围界位点提供参考。方法分别选取我国大城市和南方乡村7～22岁汉族学生27256名和40270名,同时使用BMI、腰围标准筛查超重和肥胖,分析筛查结果一致率。结果腰围标准所筛超重、肥胖率显著高于BMI标准,结果一致率较低,原因可能与腰围超重、肥胖界值点设置偏低有关;界值点偏低程度肥胖大于超重,女生大于男生,导致超重/肥胖错判率南方乡村群体显著高于大城市同龄者,与前者较低的体格发育水平有关。结论腰围界值点应适度提高,以降低错筛率。

英文摘要：

Objective By comparing with the using of BMI screening criterion,to testimony the validity of the new setting WC cutoffs in screening the prevalence of childhood overweight and obesity in two Chinese subpopulations. Methods The two objective populations came from the coastal major city and south rural areas in which there are 27 256 and 40 270 subjects,respectively. They were 7-to 22-year-old primary,secondary and college students all of which were of Han. Both the BMI criterion and the WC cutoffs were used to screen overweight and obesity. The Resultsz of the two criteria were compared and the concordance between them was analyzed. Results The prevalence of overweight/obesity using the WC cutoffs were significantly higher than that screened out by the BMI criterion,and the concordance between the two criteria were quite low. The main factors for causing these disparities were resulted by the low WC cutoffs,with that of the obesity were more significant than that of the overweight,and more evident for the females than for the males. Significant higher overestimating rates were found in the south rural population than in the coastal city population,which were closely associated by the much inferior physical growth level of the former. Conclusion The thresholds of the WC criterion are needed to be raised in order to decrease the overestimated errors. Several measures for improving the validity and accuracy of the WC cutoffs are suggested.