The Food Frequency Questionnaire (FFQ) is the most common dietary assessment tool used in large epidemiologic studies of diet and health. The self-administered FFQ booklet asks participants to report the frequency of consumption and portion size of approximately 120 line items over a defined period of time (e.g. the last month; the last three months). Each line item is defined by a series of foods or beverages. Additional questions on food purchasing and preparation methods enable the analysis software to further refine nutrient calculations.
NASR periodically designs new FFQs that reflect U.S. food consumption pattterns and major change in the market place. Our latest FFQ was designed in 2001 under the direction of the FHCRC nutrition scientists and nutritional epidemiologists and is based on the questionnaires used in two large NIH funded studies, the Selenium and Vitamin E Cancer Prevention Trial (SELECT) and the VITamins and Lifestyle study (VITAL). This FFQ has separate forms for males and females (designated as MSEL for males and GSEL for females or general population). The line items on the two questionnaires are identical, but the portion sizes are larger on the male version. Information on the development of the current FFQ can be found in the publications list.
FFQ booklets are available in English and Spanish.
See sample booklets and serving size tools.
For procedural details, see How to Use FFQs.
The cost of requested customized datasets from FFQ data is determined by project scope and may vary on a study-by-study basis.
For pricing, see User Fees
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