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Growth Chart Training

The CDC Growth Chart Reference Population - Test Your Knowledge

Why were the weights of children 6 years of age and older from NHANES III excluded from the growth reference used to develop the CDC Growth Charts?
Measurement errors in NHANES III make the data invalid.
The smaller sample size of older children in NHANES III made the curves statistically unreliable.
There was a decrease in the prevalence of obesity among children aged 6 years and older which would change the growth reference.
There was an increase in the prevalence of obesity among children aged 6 years and older in NHANES III data compared to previous data, which would have moved the growth reference higher and resulted in classification of fewer children and teens as obese.
That’s correct. To avoid an upward shift in the weight-for-age and BMI-for-age curves, weight data for children aged 6 years and older were excluded.

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Page last reviewed: April 30, 2015
Page last updated: April 30, 2015
Content source:
- Division of Nutrition, Physical Activity, and Obesity, National Center for Chronic Disease Prevention and Health Promotion

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