What We Eat In America (WWEIA)
U.S. Department of Agriculture (USDA) and the U.S. Department of Health and Human Services (DHHS)
What We Eat in America (WWEIA), NHANES is a national food survey conducted as a partnership between the U.S. Department of Health and Human Services (HHS) and the U.S. Department of Agriculture (USDA). WWEIA represents the integration of two nationwide surveys - USDA's Continuing Survey of Food Intakes by Individuals (CSFII) and HHS' NHANES. Under the integrated framework, HHS is responsible for the sample design and data collection. USDA is responsible for the survey's dietary data collection methodology, development and maintenance of the food and nutrient databases used to code and process the data. The two surveys were integrated in 2002.
Data Attributes
| Collection Method | Two days of 24-hour dietary recall data are collected in WWEIA, NHANES. The Day 1 interview is conducted in person in the Mobile Examination Center (MEC). The Day 2 interview is collected by telephone 3 to 10 days later, but not on the same day of the week as the Day 1 interview. Trained interviewers using the 5-step USDA Automated Multiple-Pass Method (AMPM) collect dietary intakes. The AMPM includes an extensive compilation of standardized food-specific questions and possible response options. Routing of questions is based on previous response. The AMPM is revised for each 2-year collection of WWEIA to reflect the changing food supply. Read more about the AMPM. During the 24-hour recall, respondents estimate the amount of food and beverages consumed using 3-dimentional models on Day 1 and the USDAs Food Model Booklet on Day 2. |
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| Other Info | N/A |