Test-retest reproducibility of a food frequency questionnaire (FFQ) and estimated effects on disease risk in the Norwegian Women and Cancer Study (NOWAC)

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Christine L Parr¹ , Marit B Veierød¹ , Petter Laake¹ , Eiliv Lund² and Anette Hjartåker¹

¹Institute of Basic Medical Sciences, Department of Biostatistics, University of Oslo, P.O. Box 1122 Blindern, N-0317 Oslo, Norway

²Institute of Community Medicine, University of Tromsø, N-9037 Tromsø, Norway

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Nutrition Journal 2006, 5:4doi:10.1186/1475-2891-5-4


Published:	31 January 2006

Additional File 1:

Additional file 1 Food items included in the dietary intake computations listed by the food groups in Table 3

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Additional File 2:

Additional file 2 Original version of the food frequency questionnaire used in the reproducibility study

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