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MICH-14 Data Details

MICH-14 Increase the proportion of women of childbearing potential with intake of at least 400 μg of folic acid from fortified foods or dietary supplements

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
No
Measure
percent 
Baseline (Year)
23.8 (2003-2006)
Target
26.2
Target-Setting Method
10 percent improvement
Numerator
Number of non-pregnant women aged 15-44 years with usual daily total intake of folic acid of greater than or equal to 400 micrograms
Denominator
Number of non-pregnant women aged 15-44 years
Data Collection Frequency
Periodic
Comparable Healthy People 2010 Objective
Retained from HP2010 objective
Methodology Notes

The proportion of non-pregnant women aged 15 to 44 years with usual daily folic acid intake of 400 mg or more is estimated from questionnaire and dietary recall data as part of the standard NHANES protocol. The method of calculation of dietary folic acid for this objective involves estimating the daily usual intake of synthetic folic acid from foods reported in two 24-hour dietary recalls using a specialized statistical program, PC-SIDE (Nusser et al., 1996). The U.S. Public Health Service published a recommendation in 1992 that all women capable of becoming pregnant consume 400 mg of folic acid daily through supplements and/or fortified foods to prevent the occurrence of neural tube defects (NTDs) (Centers for Disease Control and Prevention, 1992). The folic acid fortification of enriched cereal grain products became mandatory in 1998 (Food and Drug Administration, 1996). Prior to fortification, folic acid intake was monitored only through intake of dietary supplements containing folic acid (U.S. Department of Health and Human Services, 2000). After fortification, monitoring folic acid intake from foods became an important aspect of monitoring total folic acid intake; however it was not possible to distinguish between naturally occurring food folate and synthetic folic acid using data from NHANES until 2001. Further, it was not until the 2003-2004 NHANES that a second day of dietary recall was added, which allowed for the proper estimation of usual intake of folic acid in the population, accounting for both intra- and inter-individual variation in intake (Nusser et al., 1996; Tinker et al., 2010).

References

Additional resources about the objective.

  1. Centers for Disease Control and Prevention. Recommendations for the use of folic acid to reduce the number of cases of spina bifida and other neural tube defects. MMWR Recomm Rep 1992 41(RR-14):1-7.
  2. Food and Drug Administration. Food Standards: Amendment of Standards of Identity For Enriched Grain Products to Require Addition of Folic Acid. Federal Register 1996;61:8781-8797.
  3. Nusser SM, Carriquiry AL, Dodd KW, Fuller WA. A semiparametric transformation approach to estimating usual nutrient intake distributions. J Am Stat Assoc 1996;91:1440-9.