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For the first time, data used to construct growth charts for infants
from birth to 36 months of age is nationally representative.
The new infant growth charts were developed using data from several
sources. NHANES III provided weight, length, and head circumference data
beginning at 2 months of age. NHANES II provided data beginning at 6
months of age and NHANES I provided data beginning at 12 months of age.
Because national surveys did not collect data between birth and 2 months
of age, supplemental data was used. These data included 1) birth data from
U. S. vital statistics; 2) length and weight-for-length data from Missouri
and Wisconsin birth certificates; 3) length data from infants between 0.5
and 4.5 months of age in the Pediatric Nutrition Surveillance System; and
4) head circumference measurements at birth from the Fels Longitudinal
Study.
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