Secular trend in the sexual maturation of southern Chinese girls
Secular trend in the sexual maturation of southern Chinese girls
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DOI：
10.1111/j.1651-2227.1997.tb14820.x
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发表时间：
1997-10-01
期刊：
影响因子：
3.8
通讯作者：
Chiu, MC
中科院分区：
文献类型：
--
作者：
Huen, KF;Leung, SSF;Chiu, MC
1993年，在香港进行了一项中国正常女学生性成熟的横断面研究。本研究的目的是获得一个最新的参考正常青春期发育的中国女孩。对3749名7-19岁女孩的乳房发育进行了评估，并对3745名女孩的阴毛进行了评估。记录了6467名6岁以上女孩的月经状况。根据乳房II期或以上分期，青春期开始的中位年龄为9.78岁（95% CI 9.70-9.85）。阴毛开始发育的中位年龄为11.64岁（95%CI 11.56-11.72）。月经初潮的中位年龄为12.38岁（95%CI 11.98-12.78）。构建每个青春期阶段出现的年龄的百分位值，并将其纳入年龄身高图表中。与1962年和1979年的类似研究相比，观察到性成熟的长期下降趋势（p < 0.01）。除乳房发育外，性成熟下降的长期趋势似乎正在减弱，并可能在香港的中国女孩中停止。他们的性成熟年龄中位数现在是世界人口研究中记录的最早的中位数之一。
In 1993, a cross-sectional study of sexual maturation of normal Chinese schoolgirls was performed in Hong Kong. The aim of the study was to obtain an up-to-date reference for normal pubertal development in Chinese girls. Breast development was assessed in 3749 girls aged 7-19 y, and pubic hair rating was assessed in 3745 girls. Menstrual status was recorded in 6467 girls over 6 y of age. The median age of onset of puberty as indicated by breast stage II or above was 9.78 (95% CI 9.70-9.85) y. The median age of onset of pubic hair development was 11.64 (95% CI 11.56-11.72) y. The median age of menarche was 12.38 (95% CI 11.98-12.78) years. Percentile values for the age at which each puberty staging appeared were constructed and incorporated into the height-for-age charts. When comparison is made with similar studies done in 1962 and 1979, a significant downward secular trend in sexual maturation is observed (p < 0.01). Except for breast development the downward secular trend in sexual maturation appears to be diminishing and may be coming to a halt in the Chinese girls in Hong Kong. Their median ages of sexual maturation are now among one of the earliest medians recorded in the world population studied.