Towards transparent development of food frequency questionnaires : scientific basis of the Dutch FFQ-TOOL tm: a computer system to generate, apply and process FFQs

Introduction A well-designed food frequency questionnaire (FFQ) aims to assess habitual intake of foods or nutrients of interest in the target population. Therefore, the food list of an FFQ has to be adapted to the prevailing dietary habits of the target population and updated when re-used some time after initial development. However, due to lack of expertise, time, or finances, FFQs are often re-used without adaptations. To simplify and standardize the development of new FFQs, we developed a computer system, the Dutch FFQ-TOOLTM, to generate, apply, and process FFQs. The aim of this thesis wa... Mehr ...