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Updated: Aug 21, 2026

Assessment of Child Anthropometry in a Large Epidemiologic Study
Published on: February 2, 2017
Defining overweight in children using growth charts
1Centers for Disease Control and Prevention, Hyattsville, Maryland, USA.
Insights
Pediatric overweight is defined differently than adult obesity, using statistical BMI-for-age percentiles based on growth charts. The 2000 CDC growth charts define overweight as the 95th percentile and at-risk for overweight between the 85th and 95th percentiles for children.
Area of Science:
- Pediatric Endocrinology
- Public Health
- Growth Monitoring
Background:
- Childhood overweight and adult obesity rates have both risen.
- Definitions for pediatric overweight and adult obesity differ significantly.
- Adult obesity uses fixed cutoffs, while pediatric overweight relies on reference populations.
Purpose of the Study:
- To clarify the definitions and screening methods for pediatric overweight in the U.S.
- To highlight the specific criteria used for identifying overweight and at-risk children.
- To explain the role of the Centers for Disease Control and Prevention (CDC) growth charts.
Main Methods:
- Utilizing the 2000 CDC BMI-for-age growth charts for U.S. children and teens (ages 2-19).
- Applying statistical definitions based on reference populations for BMI.
- Establishing percentile cutoffs for overweight and at-risk for overweight categories.
Main Results:
- Overweight in children and teens is defined as a BMI-for-age greater than or equal to the 95th percentile.
- At-risk for overweight is defined as a BMI-for-age between the 85th and 95th percentiles.
- The 2000 CDC growth charts serve as a growth reference, not a prescriptive standard.
Conclusions:
- The 2000 CDC BMI-for-age growth charts are the recommended tool for screening pediatric overweight in the U.S.
- Clear percentile-based definitions are crucial for consistent identification of overweight and at-risk children.
- Understanding these definitions is vital for public health initiatives addressing childhood obesity.
Abstract:
Although the increase in pediatric overweight has paralleled the increase in obesity among adults, the definitions of obesity in adults and overweight in children are not the same. Empirically determined fixed cutoffs that identify increased risk are used for adults while statistical definitions based on reference populations are used for children. A variety of reference-data sets for BMI in childhood exist. In the United States, the 2000 Centers for Disease Control and Prevention (CDC) BMI-for-age growth charts are recommended for screening of overweight and at-risk for overweight in childhood. For children and teens ages two to 19 years, overweight is defined as a BMI-for-age > or = 95th percentile and atrisk for overweight is defined as a BMI-for-age between the 85th and 95th percentiles. The 2000 CDC growth charts provide a growth reference, not a prescriptive standard, for U.S. children.
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