Estimating food and nutrient intake from food frequency questionnaire data by reference to a standard weighed diet survey.
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.
Tefft
M. E.
ME
ESDS, Lindop Building, University of Hertfordshire, Hatfield Campus, College Lane, Hatfield, Herts. AL10 9AB, UK.
Boniface
D. R.
DR