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NWS-21.2 Data Details

NWS-21.2 Reduce iron deficiency among children aged 3 to 4 years

About the Data

Description of the data source, numerator, denominator, survey questions, and other relevant details about the national estimate.

National Data Source
National Health and Nutrition Examination Survey (NHANES); Centers for Disease Control and Prevention, National Center for Health Statistics (CDC/NCHS)
Changed Since the Healthy People 2020 Launch
Yes
Measure
percent 
Baseline (Year)
5.3 (2005-2008)
Target
4.3
Target-Setting Method
Maintain consistency with national programs, regulations, policies, and laws.
Numerator
Number of children aged 3 to 4 years with body iron less than zero.
Denominator
Number of children aged 3 to 4 years
Data Collection Frequency
Periodic
Comparable Healthy People 2010 Objective
Adapted from HP2010 objective
Methodology Notes

Body iron is defined as follows: Body iron (mg/kg) = -[log10 (sTfR X1000/ferritin)-2.8229]/0.1207, where sTfr is serum transferrin receptor in milligrams per liter and ferritin is serum ferritin in micrograms per liter.

Changes Between HP2010 and HP2020
This objective differs from Healthy People 2010 objective 19-12a in that the model used to determine iron deficiency was changed from the ferritin model to the body iron stores model.

Revision History

Any change to the objective text, baseline, target, target-setting method or data source since the Healthy People 2020 launch.

Description of Changes Since the Healthy People 2020 Launch

In 2013, the baseline data for the race/ethnicity group Black or African American only, not Hispanic or Latino was revised due to a programming error in the original estimate from 10.2 percent (SE 2.717) to a new estimate which is now supressed because it is statitistically unreliable.

References

Additional resources about the objective.

  1. Cook JD, Flowers CH, Skikne BS. The qualitative assessment of body iron. Blood 2003; 101:3359-34.
  2. Skikne BS, Flowers CH, Cook JD. Serum transferrin receptor: a qualitative measure of tissue iron deficiency. Blood 1990; 75:1870-1876.