摘要
目的研究不同青春发动时相的儿童青少年在围青春期的体脂水平及增长模式,为青春发动机制的研究和肥胖防控工作提供依据。方法整群选择上海市3所学校的329名九年级学生,回溯一-九年级时的身高和体重体检记录,用Cub ic Spline F it函数拟合得到身高突增启动年龄和身高突增高峰年龄,并以此为青春发动时相界定的依据,分析围青春期不同阶段体质量指数（BM I）-Z值和BM I-Z增加值与青春发动时相的关系。结果女生青春发育开始前、青春发育早期和中后期3个断面的高BM I-Z值都与身高突增提前有联系,而提前发生的身高突增又与青春发育早期的BM I-Z增加量有联系。男生中也发现围青春期不同断面的高BM I-Z值与身高突增提前有联系,但提前发生的身高突增与之后的BM I-Z增加量没有联系。结论男、女生青春发育开始前的高BM I-Z水平、女性青春发育早期的BM I-Z值快速增加,均可导致整个青春期乃至成人期BM I-Z值的升高。
Objective To examine peri-pubertal body mass index（BMI） in relation to pubertal timing,as assessed by age at onset of pubertal growth spurt（AOGS） and at peak height velocity（APHV）,among children and adolescents.Methods A cluster sample of 329 nine-grade students was selected from 3 schools in Shanghai.For each subject,annual measurements of height and weight from grade one to grade nine were obtained from school health record.Age at OGS and PHV,criterion for pubertal timing,were calculated by using the cubic spline fit function.Results Advanced pubertal growth spurt was estimated by using P67 of peak height velocity of pubertal growth.BMI-Z score at pre-puberty,early puberty,and middlelate puberty were analyzed in relation to pubertal timing.The increments of BMI-Z score during pre-puberty to early puberty and during early to middlelate puberty were compared between advanced and non-advanced pubertal timing groups.Results In both of girls and boys,advanced growth spurt was associated with higher BMI-Z scores in pre-puberty,early puberty and middlelate puberty.Advanced growth spurt was significantly associated with greater increment of BMI-Z scores during pre-puberty to early puberty,which is not found in boys.Conclusion Higher level of BMI in pre-puberty and greater increments of BMI-Z score during pre-puberty to early puberty may predict advance growth spurt in adolescence as well as adulthood.
出处
《中国学校卫生》
CAS
北大核心
2011年第4期414-416,共3页
Chinese Journal of School Health
