Secular Trends in the Median Age at Menarche and Spermarche Among Chinese Children From 2000 to 2019 and Analysis of Physical Examination Indicators Factor

IF 1.6 4区医学 Q1 ANTHROPOLOGY American Journal of Human Biology Pub Date : 2024-12-09 DOI:10.1002/ajhb.24198

Jiajia Hu, Wenhao Han, Meng Zhou, Yixiao Geng, Junna Zhang, Fanke Zhou, Wencan Wu, Xiaolei Ban, Xiaomin Lou, Xian Wang

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Abstract

Objectives

This research aimed to understand the long-term trends in the age of menarche among girls and spermarche among boys, and to analyze the factors that may influence the onset of menarche and first spermarche.

Methods

The study was based on data from 49 566 students in Henan Province collected from the Chinese National Surveys on Students' Constitution and Health (CNSSCH) conducted between 2000 and 2019. Median age at menarche and spermarche was estimated by probit analysis. t-Tests were used to analyze the influence of menarche and first spermarche on physical examination indexes of adolescent children, and the chi-squared test was used to compare whether the differences in physical activity were statistically significant.

Results

The age at menarche has decreased from 12.33 years in 2000 to 12.00 years in 2019, and the age at first spermarche has decreased from 14.01 years in 2000 to 13.99 years in 2019. The age at first spermarche in urban boys (13.61 years in 2000; 12.94 years in 2014) was consistently younger than that in rural boys (14.43 years in 2000; aged 13.08 in 2014), except in 2019. The age of menarche in urban girls (12.23 years in 2000; 11.89 years in 2019) was always earlier than that in rural girls (12.44 years in 2000; 12.05 years in 2019).

Conclusions

The age at menarche and spermarche for children in Henan Province generally showed a decreasing trend from 2000 to 2019. The status of BMI is significantly associated with the early onset of puberty in children.

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2000 - 2019年中国儿童初潮、遗精中位年龄的长期变化趋势及体检指标因素分析

目的：了解女孩初潮年龄和男孩积精年龄的长期变化趋势，分析可能影响初潮和第一积精发生的因素。方法：研究基于2000年至2019年中国全国学生体质与健康调查（CNSSCH）中河南省49566名学生的数据。初潮和遗精年龄中位数通过概率分析估计。采用t检验分析初潮和第一精子对青少年儿童体检指标的影响，采用卡方检验比较体力活动差异是否有统计学意义。结果：初潮年龄由2000年的12.33岁降至2019年的12.00岁，初精年龄由2000年的14.01岁降至2019年的13.99岁。城市男孩初生精子年龄(2000年13.61岁；（2014年为12.94岁）一直低于农村男孩(2000年为14.43岁；2014年13.08岁)，2019年除外。城市女孩月经初潮年龄(2000年12.23岁；（2019年为11.89岁）始终早于农村女孩(2000年为12.44岁；2019年为12.05年)。结论：2000 - 2019年河南省儿童初潮年龄和精子年龄总体呈下降趋势。BMI的状态与儿童青春期的早发有显著的关系。

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来源期刊

American Journal of Human Biology 生物-生物学

CiteScore

4.80

自引率

13.80%

发文量

124

审稿时长

4-8 weeks

期刊介绍： The American Journal of Human Biology is the Official Journal of the Human Biology Association. The American Journal of Human Biology is a bimonthly, peer-reviewed, internationally circulated journal that publishes reports of original research, theoretical articles and timely reviews, and brief communications in the interdisciplinary field of human biology. As the official journal of the Human Biology Association, the Journal also publishes abstracts of research presented at its annual scientific meeting and book reviews relevant to the field. The Journal seeks scholarly manuscripts that address all aspects of human biology, health, and disease, particularly those that stress comparative, developmental, ecological, or evolutionary perspectives. The transdisciplinary areas covered in the Journal include, but are not limited to, epidemiology, genetic variation, population biology and demography, physiology, anatomy, nutrition, growth and aging, physical performance, physical activity and fitness, ecology, and evolution, along with their interactions. The Journal publishes basic, applied, and methodologically oriented research from all areas, including measurement, analytical techniques and strategies, and computer applications in human biology. Like many other biologically oriented disciplines, the field of human biology has undergone considerable growth and diversification in recent years, and the expansion of the aims and scope of the Journal is a reflection of this growth and membership diversification. The Journal is committed to prompt review, and priority publication is given to manuscripts with novel or timely findings, and to manuscripts of unusual interest.