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Head circumference growth reference charts of children younger than 7 years in Chinese rural areas
Shengnan Xie1, Junxin Shi2, Jianmin Wang1
1Department of Woman and Child's Care and Adolescence Health, School of Public Health, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, Hubei, China.
Insights
New head circumference growth charts for rural Chinese children under 7 are essential. Rural children’s head circumference percentiles are smaller than urban and international references after age two.
Area of Science:
- Pediatrics
- Anthropometry
- Public Health
Background:
- Current Chinese head circumference growth charts are based on urban children.
- Urban and rural populations differ in socioeconomic factors and diet, potentially impacting growth.
- Existing references may not accurately reflect head circumference growth in rural Chinese children.
Purpose of the Study:
- To develop reliable head circumference growth reference charts for male and female children under 7 years in rural China.
- To address the limitations of existing urban-based references for rural populations.
Main Methods:
- Multistage stratified cluster sampling across 10 Chinese provinces.
- Data collection via questionnaires and anthropometric measurements, including head circumference.
- Comparison of cross-sectional data with urban Chinese, WHO, and US references.
Main Results:
- A study of 95,904 children (48,722 boys, 47,182 girls) was conducted.
- Age- and sex-specific head circumference growth charts for rural Chinese children under 7 are presented.
- Rural Chinese children exhibit smaller head circumference percentiles than urban Chinese, WHO, and US children after age two.
Conclusions:
- Current head circumference growth references from urban China may not be suitable for rural areas.
- Head circumference percentiles are vital for growth monitoring.
- Establishing specific reference charts for rural Chinese children is crucial for accurate health assessments.
Background:
The head circumference growth reference charts for children in China are presently based on urban children. However, the references may not apply to rural children because of the differences between urban and rural areas, such as economy, culture, and dietary habits. Our objective was to provide a reliable continuous set of head circumference growth reference charts for male and female children less than 7 years of age in Chinese rural areas.
Methods:
Children in our study were identified by multistage stratified cluster sampling from rural areas of 10 provinces in China. Questionnaire survey and anthropometric measurements were conducted in data collection. Head circumference was measured with a nonelastic tape on a line passing over the glabella and posterior occipital protrusion in children. We compared the fiftieth percentile of our cross-sectional data with the data of Chinese cities, World Health Organization, and the United States.
Results:
A total of 95,904 children (48,722 boys and 47,182 girls) were included in the study. We present age- and sex-appropriate head circumference growth charts younger than 7 years for Chinese rural areas. The head circumference percentiles of the children in rural China are much smaller than the children in Chinese urban areas, World Health Organization, and the US percentiles after 2 years old.
Conclusions:
Head circumference percentiles can be applied in growth monitoring, but current head circumference growth references promulgated in urban China may not be suitable for rural areas in China. Providing head circumference growth reference charts for rural Chinese children who are younger than 7 years old is very important.
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