How to calculate FFQ (Food Frequency Questionnaire)
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4 min read
Food frequency questionnaires (FFQs) are a common dietary assessment tool used in large epidemiological studies due to their cost-effectiveness and relatively low respondent burden. The length of an FFQ can range from about 20 to over 200 food items, depending on the study's purpose. Calculating results from this data involves a precise, multi-step process that converts reported frequencies and portion sizes into meaningful nutritional estimates.
