Erhebungsmethoden für die Ernährungsepidemiologie

Although diet and nutrition are considered important for health their relation to disease development, especially with respect to chronic diseases, often remains to be clarified. Recent comprehensive research efforts have substantially contributed to this clarification. However, methodological limitations of the underlying data have also become apparent. Random and systematic measurement errors of the applied assessment instruments are one considerable problem. For the most frequently used dietary assessment instrument, the food frequency questionnaire, statistical approaches for measurement error reduction have been developed. Future studies should work with novel assessment approaches. To this end, repeated 24-h recalls combined with questionnaires and, if applicable, with biomarkers are recommended.