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National Health and Nutrition Examination Survey : 2021 dietary interviewer procedures manual
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May 2021
[PDF-11.92 MB]
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Description:Dietary information has been collected in NHANES since the 1970s. Researchers and policymakers rely on NHANES data for detailed information about the foods and beverages that are consumed by the U.S. population. In addition to providing important national reference data on food and nutrient intakes that are obtained on all survey participants, the data help us to learn about food patterns of ethnic subgroups, the adequacy of diets consumed by young children and older persons, and the contribution of food to total nutrient intakes. Total nutrient intakes from food and dietary supplements can be computed by combining NHANES Dietary Recall data with dietary supplement information. Many Federal agencies use NHANES data to evaluate Federal regulations in the areas of food fortification and human risk assessment analyses, the latter being used to measure human exposure to contaminants that are found in food. All these monitoring and research applications are dependent on the quality and completeness of the dietary interview data.
In the 2021-2022 survey, two dietary interviews will be administered via telephone to all sample persons (SPs). The primary dietary interview is administered in English and Spanish after the visit to the mobile examination center (MEC). This Day 1 Dietary Interview will be scheduled in the MEC for 3-7 days later. In addition, during the scheduling of this interview appointment the scheduler will dispense a set of measuring guides. The second interview, the Day 2 Dietary Interview, will be scheduled 3-10 days after the Day 1 on a different day of the week.
2021-Dietary-Interviewer-Procedures-508.pdf
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Pages in Document:315 pages in various pagings
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