Development, validation and utilisation of food-frequency questionnaires – a review

The purpose of this review is to provide guidance on the development, validation and use of food-frequency questionnaires (FFQs) for different study designs. It does not include any recommendations about the most appropriate method for dietary assessment (e.g. food-frequency questionnaire versus weighed record).A comprehensive search of electronic databases was carried out for publications from 1980 to 1999. Findings from the review were then...