J Freese1, S Feller2, U Harttig2, C Kleiser3, J Linseisen3, B Fischer4, M F Leitzmann4, J Six-Merker5, K B Michels6, K Nimptsch7, A Steinbrecher7, T Pischon7, T Heuer8, I Hoffmann8, G Jacobs9, H Boeing2, U Nöthlings1. 1. 1] Nutritional Epidemiology, Department of Nutrition and Food Sciences, University Bonn, Bonn, Germany [2] Section of Epidemiology, Institute of Experimental Medicine, University Kiel, Kiel, Germany. 2. Department of Epidemiology, German Institute of Human Nutrition Potsdam-Rehbruecke, Nuthetal, Germany. 3. Institute of Epidemiology, Helmholtz Center Munich, German Research Center for Environmental Health, Neuherberg, Germany. 4. Institute of Epidemiology and Preventive Medicine, University Medical Center Regensburg, Regensburg, Germany. 5. 1] Institute of Epidemiology, Helmholtz Center Munich, German Research Center for Environmental Health, Neuherberg, Germany [2] Institute for Prevention and Cancer Epidemiology, University Medical Center Freiburg, Freiburg, Germany. 6. 1] Institute for Prevention and Cancer Epidemiology, University Medical Center Freiburg, Freiburg, Germany [2] Obstetrics and Gynecology Epidemiology Center, Department of Obstetrics and Gynecology, Brigham and Women's Hospital, Harvard Medical School, Boston, MA, USA. 7. Molecular Epidemiology Group, Max Delbrueck Center for Molecular Medicine (MDC) Berlin-Buch, Berlin, Germany. 8. Max Rubner-Institut, Federal Research Institute of Nutrition and Food, Karlsruhe, Germany. 9. Section of Epidemiology, Institute of Experimental Medicine, University Kiel, Kiel, Germany.
Abstract
BACKGROUND/ OBJECTIVES: The validity of dietary assessment in large-scale cohort studies has been questioned. Combining data sources for the estimation of usual intake in a blended approach may enhance the validity of dietary measurement. Our objective was to develop a web-based 24-h food list for Germany to identify foods consumed during the previous 24 h and to evaluate the performance of the new questionnaire in a feasibility study. SUBJECTS/ METHODS: Available data from the German National Nutrition Survey II were used to develop a finite list of food items. A total of 508 individuals were invited to fill in the 24-h food list via the Internet up to three times during a 3-6-month time period. In addition, participants were asked to evaluate the questionnaire using a brief online evaluation form. RESULTS: In total, 246 food items were identified for the 24-h food list, reflecting >75% variation in intake of 27 nutrients and four major food groups. Among the individuals invited, 64% participated in the feasibility study. Of these, 100%, 85% and 68% of participants completed the 24-h food list one, two or three times, respectively. The average time needed to complete the questionnaire was 9 min, and its acceptability by participants was rated as high. CONCLUSIONS: The 24-h food list represents a promising new dietary assessment tool that can be used as part of a blended approach combining multiple data sources for valid estimation of usual dietary intake in large-scale cohort studies.
BACKGROUND/ OBJECTIVES: The validity of dietary assessment in large-scale cohort studies has been questioned. Combining data sources for the estimation of usual intake in a blended approach may enhance the validity of dietary measurement. Our objective was to develop a web-based 24-h food list for Germany to identify foods consumed during the previous 24 h and to evaluate the performance of the new questionnaire in a feasibility study. SUBJECTS/ METHODS: Available data from the German National Nutrition Survey II were used to develop a finite list of food items. A total of 508 individuals were invited to fill in the 24-h food list via the Internet up to three times during a 3-6-month time period. In addition, participants were asked to evaluate the questionnaire using a brief online evaluation form. RESULTS: In total, 246 food items were identified for the 24-h food list, reflecting >75% variation in intake of 27 nutrients and four major food groups. Among the individuals invited, 64% participated in the feasibility study. Of these, 100%, 85% and 68% of participants completed the 24-h food list one, two or three times, respectively. The average time needed to complete the questionnaire was 9 min, and its acceptability by participants was rated as high. CONCLUSIONS: The 24-h food list represents a promising new dietary assessment tool that can be used as part of a blended approach combining multiple data sources for valid estimation of usual dietary intake in large-scale cohort studies.
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