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Most pediatricians in the U.S. use the CDC 2000 growth charts and define shortness, underweight, and overweight by the 5th and 95th percentiles. These charts were derived from cross-sectional U.S. data from 1970 through the early 1990s. The WHO 2006 growth charts for children aged 0 to 5 years are derived from data on healthy breast-fed children with no economic constraints on growth from Brazil, India, Ghana, Norway, Oman, and the U.S. WHO data for children aged 0 to 2 years are longitudinal, and data for children aged 2 to 5 years are cross-sectional. The WHO 2006 recommended cutoff values for shortness, underweight, and overweight are two standard deviations above and below the mean (the 2.3rd and 97.7th percentiles).
CDC researchers comp…