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NWS-21.1 Data Details

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NWS-21.1 Reduce iron deficiency among children aged 1 to 2 years

About the Data

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

Data Source: 
National Health and Nutrition Examination Survey
Changed Since the Healthy People 2020 Launch: 
No
Measure: 
percent
Baseline (Year): 
15.9 (2005–08)
Target: 
14.3
Target-Setting Method: 
10 percent improvement
Numerator: 

Number of children aged 1 to 2 years with body iron less than zero.

Denominator: 

Number of children aged 1 to 2 years

Comparable Healthy People 2010 Objective: 
Adapted from HP2010 objective
Data Collection Frequency: 
Periodic
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.

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.