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Updated: May 12, 2026

Assessment of Child Anthropometry in a Large Epidemiologic Study
Published on: February 2, 2017
Body mass index for children aged 6-18 years in Beijing, China
Dongmei Qiu1, Xin Guo, Jiali Duan
1Department of Social Medicine, National Research Institute for Child Health and Development, National Center for Child Health and Development, Tokyo, Japan. qiu-d@ncchd.go.jp
Insights
Beijing children show higher Body Mass Index (BMI) levels compared to national averages, with urban children being heavier than rural ones. This highlights a dual nutritional burden, necessitating targeted interventions for obesity and underweight in Chinese youth.
Area of Science:
- Pediatric Endocrinology
- Public Health Nutrition
- Growth Monitoring
Background:
- Obesity is a significant global public health challenge.
- Understanding pediatric Body Mass Index (BMI) trends is crucial for public health.
- Regional variations in child BMI necessitate localized data.
Purpose of the Study:
- To establish age-, sex-, and region-specific BMI percentile curves for Beijing children.
- To compare Beijing children's BMI data with Chinese national statistics and international references.
- To identify disparities in BMI between urban and rural Beijing children.
Main Methods:
- Utilized the LMS method to construct BMI percentile curves.
- Analyzed data from 8,155 children (4,078 boys, 4,077 girls) aged 6-18 years in Beijing.
- Data collected between September 1 and November 30, 2005.
Main Results:
- Significant differences in BMI curves were observed between boys and girls.
- Urban Beijing children exhibited higher upper-percentile BMI compared to rural children.
- Beijing's BMI curves exceeded Chinese national levels, with specific variations noted against WHO and developed country references for both sexes.
Conclusions:
- Beijing children demonstrate higher average BMI than the Chinese national average.
- Urban children in Beijing present with higher BMI than their rural counterparts.
- The observed BMI polarization in Beijing boys suggests a dual burden of malnutrition (overweight/obesity and underweight).
- Urgent public health policies and interventions are required to address both obesity and underweight in Chinese children.
Background:
Obesity constitutes one of the most important worldwide public health concerns.
Aim:
To develop BMI percentile curves by age, sex and urban-rural regions for Beijing children and compare the results with Chinese national data and international references.
Subjects And Methods:
Boys (4078) and girls (4077), aged 6-18 years, were recruited from 1 September to 30 November 2005 in Beijing, China. BMI percentile curves were constructed using the LMS method.
Results:
BMI curves differed between boys and girls. BMI curves for urban children were higher than rural children at the upper percentile. Beijing BMI curves were higher than the Chinese national level. Beijing boys had a higher BMI in medium (6.5-14 years) and upper percentiles and a lower BMI in lower percentiles than WHO and developed references, whereas Beijing girls were lower in medium and lower percentiles, but higher compared to a WHO reference before age 15.5 years in upper percentiles.
Conclusions:
Beijing children are fatter than the Chinese national level. Beijing urban children are fatter than rural Beijing children. The polarization of BMI values for Beijing boys suggests these children face a dual-burden of nutrition. Effective policies and interventions to control obesity and underweight in Chinese children are necessary.
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