Reproducibility and validity of a food frequency questionnaire in a case-control study on breast cancer.

Abstract

A 110-item food frequency questionnaire was tested among 152 community controls of the Kuopio Breast Cancer Study. They completed the questionnaire twice and kept two 7-day diet records at 3-month intervals. The intraclass correlations for nutrients varied from 0.49 (thiamine with supplements) to 0.81 (lactose), and for foods from 0.52 (poultry) to 0.84… (More)

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@article{Mnnist1996ReproducibilityAV, title={Reproducibility and validity of a food frequency questionnaire in a case-control study on breast cancer.}, author={Satu M{\"a}nnist{\"{o} and Mikko J Virtanen and Taina Mikkonen and Pirjo Pietinen}, journal={Journal of clinical epidemiology}, year={1996}, volume={49 4}, pages={401-9} }