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[Update on pubertal development among primary school students in Shanghai, 2014]
1Department of Endocrinology and Genetic Disease, Shanghai Children's Medical Center Affiliated to Shanghai Jiaotong University School of Medicine; Ministry of Education Shanghai Key Laboratory of Children's Environmental Health, Shanghai 200127, China.
Summary
Pubertal development was assessed in Shanghai schoolchildren. A significant percentage of girls aged 6-7 showed early breast development, and precocious puberty was noted in both sexes, highlighting the need for education.
Area of Science:
- Pediatric Endocrinology
- Public Health
- Child Development
Background:
- Pubertal development timing is crucial for child health and well-being.
- Understanding current pubertal trends in urban Chinese populations is essential for monitoring child health.
Purpose of the Study:
- To determine the prevalence of pubertal development stages in healthy Shanghai schoolchildren.
- To identify rates of precocious puberty in this cohort.
Main Methods:
- Cross-sectional study of 16,197 Shanghai schoolchildren (grades 1-5) in 2014.
- Utilized Tanner staging for breast and pubic hair development, testicular volume measurement, and self-reported menarche/spermatorrhea.
- Employed multi-stage cluster sampling and inverse probability weighting (IPW) for representative data.
Main Results:
- In girls (6-7 years), 17.2% had Tanner stage ≥II breast development and 19.0% were diagnosed with precocious puberty.
- In boys (6-8 years), 1.7% had testicular volume ≥4 ml and 2.3% were diagnosed with precocious puberty.
- Menarche prevalence was 0.3% in girls aged 6-9 years; spermatorrhea was 0.1% in boys.
Conclusions:
- Precocious puberty and early pubertal signs are prevalent in Shanghai schoolchildren.
- Adolescent and sex education is vital for this population.
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