关键词: 青春发动时相, 性发育, 肥胖, 儿童

Abstract: Objective To identify the association between pubertal timing and body fat content and distribution among children in Zhengzhou. Methods Using the cross-sectional survey method,7~18 years old students were selected from four urban schools and five rural schools.By means of physical examination and the examination of secondary sexual characteristics development,5 140 samples were available. Results The number of boys in early-timing pubertal group was 286(13.0%),and 1 052(47.9%) boys were grouped into on-time pubertal group.The number of girls in early-timing pubertal group and on-time pubertal group was 301(11.8%) and 1 174(46.2%),respectively.The overweight(with obesity) detection rate of boys in early-timing pubertal group was higher than that in on-time pubertal group (χ²=35.372,P＜0.001).The same was true of girls (χ²=31.485,P＜0.001).Body fat percentage and waist-hip ratio of boys and girls in early-timing pubertal group were higher than those in on-time pubertal group,the differences were statistically significant. Conclusion Excessive body fat content and body fat distribution are related to the early pubertal timing of children.

Key words: pubertal timing, sexual development, obesity, children