Critical period for menarche derived by the wavelet interpolation method from changes in BMI with age in South Korean girls.
Critical period for menarche derived by the wavelet interpolation method from changes in BMI with age in South Korean girls.
复制标题
根据韩国女孩BMI随年龄的变化，采用小波插值法得出初潮关键期。
DOI：
--
复制
发表时间：
2010
期刊：
影响因子：
--
通讯作者：
Nozomi Tanaka
中科院分区：
文献类型：
--
作者：
K. Fujii;Nozomi Tanaka
最近，关于体重指数随年龄变化的研究很少有报道。本研究应用小波内插法(WIM)研究了朝鲜族女生从小学一年级到高中二年级的BMI随年龄的变化，通过测定BMI的MPV峰值年龄，确定了BMI峰值峰值年龄(MPV)与初潮年龄之间的关系。通过对韩国釜山地区263名高中二年级女生的问卷调查，获得了初潮年龄和活动状况。此外，从体检记录中获得了从小学一年级到高中二年级(1997年至2008年)的身高和体重的纵向增长数据。从小学一年级到高中二年级的身高和体重计算BMI，并对每个年级的BMI距离进行小波内插。用小波插值法确定BMI随年龄的变化曲线，并以BMI的速度随年龄的变化曲线为分化曲线，确定BMI的MPV时年龄。BMI的平均年龄为12.76±1.6岁，初潮年龄为12.34±1.1岁。两个时间点的年龄间隔为-0.42+/-1.6岁，初潮年龄与BMI的MPV年龄之间存在显著差异。月经初潮年龄略早于体重指数的MPV年龄的原因被假设为韩国女学生睡眠不足影响的褪黑素水平异常。但建议BMI的MPV年龄可作为月经初潮年龄的临界期。
Recently, few studies regarding the changes in BMI with age have been reported. In the present study, the wavelet interpolation method (WIM) was applied to the changes in BMI with age from the first grade of elementary school until the second year of high school in Korean girls, and the relationship between age at the maximum peak velocity (MPV) of BMI and age at menarche was confirmed by determining the age at MPV of BMI. Age at menarche and activity status were obtained from questionnaires given to 263 second grade high school girls in the Pusan area of South Korea. Moreover, longitudinal growth data on height and weight from the first grade of elementary school until the second year of high school (from 1997 to 2008) were obtained from health examination records. BMI was calculated from height and weight values from the first grade of elementary school until the second year of high school, and wavelet interpolation was applied to the distances of BMI in each grade. The change curve of BMI with age was determined by wavelet interpolation, and the age at MPV of BMI was determined from the changes in the velocity curve with age as the differentiation curve. Age at MPV of BMI was found to be 12.76 +/- 1.6 years, and age at menarche to be 12.34 +/- 1.1 years. The interval in age at the two times was -0.42 +/- 1.6 years, and a significant difference was seen between age at menarche and age at MPV of BMI. The reason that the age at menarche was a little earlier than the age at MPV of BMI is hypothesized to be abnormal melatonin levels influenced by lack of sleep in Korean school girls. However, it is proposed that the age at MPV of BMI is valid as the critical period for the age at menarche.