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目的探讨不同体成分青春早期女孩体脂含量与性发育水平之间的关系,为研究儿童单纯性肥胖预防对策提供基础资料。方法整群抽取沈阳市沈河区3所小学8岁女生327名,按皮褶厚度推算体脂含量。按体脂比将研究对象分为肥胖、中等、消瘦3组,共筛选女孩105名,追踪观察4 a。采用Harpenden式卡钳检测皮褶厚度,唾液雌二醇水平采用化学发光酶联免疫法。结果追踪4 a期间,不同体成分组女孩身高、体重均随年龄的增加而增加;3组女孩的体脂肪和瘦体重均随年龄的增加而增加,且肥胖组(中等组(消瘦组;肥胖组女孩体脂比在8~10岁时呈上升趋势,10岁开始逐渐下降,而中等组和消瘦组一直呈现上升趋势。3组女孩唾液雌二醇水平随年龄的增加而增加,肥胖组的雌二醇水平在8~9岁时高于中等组和消瘦组,8岁时差异有统计学意义(P<0.05)。不同体成分女孩月经来潮率不同,肥胖组高于消瘦组(P<0.01)。结论青春早期不同体成分女孩性发育存在差异,肥胖女孩性发育提前。
Objective To investigate the relationship between body fat content and sexual development of young girls with different body composition in early adolescence, and to provide basic information for the study on prevention measures of childhood simple obesity. Methods A total of 327 female students aged 8 years old from 3 primary schools in Shenhe District of Shenyang City were enrolled in this study. Body fat content was calculated according to skinfold thickness. According to body fat ratio, the subjects were divided into three groups: obesity, moderate and emaciation. A total of 105 girls were screened and traced for 4 years. Harpenden calipers were used to detect skinfold thickness, salivary estradiol levels using chemiluminescence enzyme-linked immunosorbent assay. Results During the 4-year follow-up, height and weight of girls in different body composition groups increased with age. Body fat and lean body mass of 3 groups of girls increased with increasing age, and obesity (medium group The body fat ratio of the girls in the group tended to rise from the age of 8 to 10 years and gradually decreased from the age of 10 years, while the average group and the wasting group all showed an upward trend. The saliva estradiol levels of the three groups of girls increased with age, The level of estradiol was higher in 8 to 9 years old than in moderate group and emaciated group, and the difference was statistically significant at 8 years old (P <0.05) .The girls of different body constitution had different menstrual cramps, obese group was higher than emaciated group (P < 0.01) .ConclusionDifferent body composition in early adolescent girls sexual development differences, obese girls early sexual development.