Reproducibility and feasibility of an online self-administered food frequency questionnaire for use among adult Norwegians Monica Hauger Carlsen, Lene F. Andersen and Anette Hjartker

Background: New methods of dietary assessment are increasingly making use of online technologies. The development of a new online food frequency questionnaire warranted investigation of its feasibility and the reproducibility of its results. Objective: To investigate the feasibility and reproducibility of a newly developed online FFQ (WebFFQ). Design: The semiquantitative WebFFQ was designed to assess the habitual diet the previous year, with ques- tions about frequency of intake and portion...