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目的探讨使用偏度-中位数-变异系数法(LMS法)建立并比较乌鲁木齐市7～18岁维吾尔族(维族)和汉族青少年超重、肥胖的体重指数(BMI)分类标准。方法采用分层整群抽样方法,调查新疆乌鲁木齐市7～18岁维、汉族中小学生9146人,绘制两民族7～18岁青少年年龄别、性别BMI百分位曲线,确定18岁时分别通过国际肥胖工作组(IOTF)和中国肥胖问题工作组(WGOC)成年人超重、肥胖标准的特殊百分位数曲线,由此获得两民族7～18岁人群超重和肥胖的界值标准。结果18岁时通过25及30 kg/m~2的百分位曲线:维族男生为P_(94.46)和P_(99.58),维族女生为P_(92.44)和P_(99.64),汉族男生为P_(85.05)和P_(97.26),汉族女生为P_(90.92)和P_(99.03);通过24及28 kg/m~2的百分位曲线维族男生为P_(90.54)和P_(98.86),维族女生为P_(86.96)和P_(98.77),汉族男生为P_(78.98)和P_(94.72),汉族女生为P_(86.15)和P_(97.56)。结论BMI分布具有民族特异性;对维族青少年超重、肥胖筛检时建议参考使用该研究标准。
OBJECTIVE: To establish and compare the classification criteria of body mass index (BMI) of overweight and obesity among Uygur and Han nationality adolescents aged 7-18 in Urumqi by using skewness-median-coefficient of variation (LMS) method. Methods A stratified cluster sampling method was used to investigate 9146 primary and secondary school students aged 7-18 in Urumqi and Han nationality in Urumqi. The age-specific and gender BMI percentile curves were drawn for adolescents aged 7-18 in the two ethnic groups. At the age of 18, (IOTF) and China Overexploitation Working Group (WGOC) adults were overweight and obesity standards for the special percentile curve, thereby obtaining the two nationalities of 7 to 18 years old population overweight and obesity threshold value. Results Percentile curves of 25 and 30 kg / m ~ 2 at age 18 showed P_ (94.46) and P_ (99.58) for Uygur boys, P_ (92.44) and P_ (99.64) for Uygur girls, P_ ( 85.05) and P (97.26) respectively, P_ (90.92) and P_ (99.03) for Han girls, P_ (90.54) and P_ (98.86) for Uygur boys by the percentile curves of 24 and 28 kg / m ~ P_ (86.96) and P_ (98.77), P_ (78.98) and P_ (94.72) in Han boys, P_ (86.15) and P_ (97.56) in Han girls. Conclusion The distribution of BMI is national specific. For Uygur adolescent screening of overweight and obesity, it is recommended to use this research standard.