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MICH-21.5 Data Details

MICH-21.5 Increase the proportion of infants who are breastfed exclusively through 6 months

About the Data

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

National Data Source
National Immunization Survey (NIS); Centers for Disease Control and Prevention, National Center for Immunization and Respiratory Diseases and National Center for Health Statistics (CDC/NCIRD and CDC/NCHS)
Changed Since the Healthy People 2020 Launch
Yes
Measure
percent 
Baseline (Year)
14.1 (2006)
Target
25.5
Target-Setting Method
Projection/trend analysis
Numerator
Number of caregivers of children born in a cohort year who indicate their child was exclusively breastfed (given nothing but breast milk) through 6 months of age
Denominator
Number of children aged 19-35 months born in the same cohort year
Questions Used to Obtain the National Baseline Data

From the 2006 National Immunization Survey:

[NUMERATOR:]

Was the child ever breastfed or fed breast milk?

  1. Yes
  2. No

How old was [child's name] when [child's name] completely stopped breastfeeding or being fed breast milk?

  1. ≥6 months
  2. Still breastfeeding

How old was [child's name] when (he/she) was first fed formula?

  1. ≥6 months
  2. Never fed formula

This next question is about the first thing that [child] was given other than breast milk or formula. Please include juice, cow's milk, sugar water, baby food, or anything else that [child] may have been given, even water.

How old was [child's name] when (he/she) was first fed anything other than breast milk or formula?

  1. ≥6 months
  2. Never given anything but breast milk
Data Collection Frequency
Annual
Comparable Healthy People 2010 Objective
Retained from HP2010 objective
Methodology Notes

Infants are considered to have been breastfed exclusively through 6 months if the responses to questions about age when first fed formula AND age when first fed something other than breast milk or formula both indicate that the child was ≥6 months when either occurred OR that the child has never had formula nor anything but breast milk.

Using a computer-generated list, the National Immunization Survey (NIS) identifies households across the United States with children aged 19–35 months and interviews the person who is most knowledgeable about the child’s immunization status (“caregiver”). Survey years are combined to calculate breastfeeding statistics by year of child’s birth (cohort) instead of the year in which the participant was surveyed. To calculate breastfeeding indicators by year of child birth, data are combined across all relevant survey years. Because children are 19—35 months of age at the time of the parent interview, each survey year represents children born over three years. For example, breastfeeding data for children in the 2006 birth cohort are obtained from NIS 2007, 2008, and 2009.

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 2012, the word 'breastfeed' was changed to 'breastfed' to reflect the data collected in the survey. Specifically, the NIS data relate to infants who are breastfed, not mothers who breastfeed.

References

Additional resources about the objective.

  1. CDC. NIS survey methods. Available at: http://www.cdc.gov/breastfeeding/data/NIS_data/survey_methods.htm (Accessed March 21, 2010.)
  2. CDC. Provisional exclusive breastfeeding rates by socio-demographic factors, among children born in 2006. Available at: http://www.cdc.gov/breastfeeding/data/NIS_data/2006/socio-demographic.htm (Accessed March 20, 2010.)
  3. Smith PJ, Zhao Z, Wolter KM, Singleton JA, Nuorti JP. Age-period-cohort analyses of public health data collected from independent serial cross-sectional complex probability sample surveys. Seattle, WA: Joint Statistical Meeting; 2006. Available at http://www.amstat.org/Sections/Srms/Proceedings/y2006/Files/JSM2006-000537.pdf