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Four instruments collect dietary data.

4-Day Food Record

The 4-Day Food Record (4DFR) was a self-administered 4-day journal of dietary data. The data was collected as free response and was converted into food counts, and these datasets do not contain the free response answers. Foods, supplements, nutrients, and food patterns equivalents data was compiled using the USDA Food and Nutrient Database for Dietary Studies (FNDDS) and the USDA Food Patterns Equivalents Database (FPED).

The 4DFR files are provided two ways: one set of files includes the 2 administration attempts. The extra files contain extra administrations data for the 9 people who completed 3 administrations. The first set of data files, those not containing the extra administrations, are recommended for analysis.

Click here for data dictionaries and formats for the 4DFR files. Datasets can be obtained by submitting a request.

Summary Available Data
  • Self-reported data of everything that they consumed for four days.
  • Completed 2 times per person 6 months apart
  • 857 participants with results
    • 680 with both administrations
  • 847 participants with 4 days in an administration
    • 670 with 4 days in both administrations
  • Individual Foods File: FNDDS food codes, gram weights and nutrients for each food reported
  • Daily Total Nutrients File: FNDDS nutrients from all foods reported in a given day
  • Admin Summary File: FNDDS nutrients from all foods reported in each day in a given admin
  • Person Summary File: FNDDS nutrients from all foods reported in each day for a given person
  • Extra Administrations: Individual Foods File: FNDDS food codes, gram weights and nutrients for each food reported
  • Extra Administrations: Daily Total Nutrients File: FNDDS nutrients from all foods reported in a given day
  • Extra Administrations: Admin Summary File: FNDDS nutrients from all foods reported in each day in a given admin