2010-09-14Zeitschriftenartikel
Relative validation of a food frequency questionnaire for national health and nutrition monitoring
Haftenberger, Marjolein; Heuer, Thorsten; Heidemann, Christin; Kube, Friederike; Krems, Carolin; Mensink, Gert
Background: Validation of a food frequency questionnaire (FFQ) is important as incorrect information may lead to biased associations. Therefore the relative validity of an FFQ developed for use in the German Health ...