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Estimating food and nutrient intake from food frequency questionnaire data by reference to a standard weighed diet
1ESDS, Lindop Building, University of Hertfordshire, Hatfield Campus, College Lane, Hatfield, Herts. AL10 9AB, UK.
Abstract:
INTRODUCTION: The food frequency questionnaire is widely regarded as more appropriate for ranking and grouping individuals according to levels of nutrient intake than for estimating absolute nutrient amounts. AIMS: To develop a method for estimation of amount of nutrient intake from food frequency questionnaires by reference to an independent weighed dietary survey. METHOD: Six stages of the method are described and illustrated in the estimation of total dietary fat from the 1984-85 Health and Lifestyle Survey using the 1986-87 Dietary and Nutritional Survey of British Adults as the reference standard. RESULTS: Several points support the validity of the approach although limitations are identified.