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  1. Reproducibility and relative validity of energy and macronutrient intake of a food frequency questionnaire developed for the German part of the EPIC project.

    Article - En anglais

    Background

    For use in the German part of the European Prospective Investigation into Cancer and Nutrition (EPIC) a self-administered, optically readable food frequency questionnaire (FFQ) was developed to assess individuals'usual food and nutrient intake over the past year.

    The food list comprised 158 food items for which the typical portion size, the consumption frequency (1-6 times) and the time period (day, week, month, or year) were requested.

    This paper reports the results of the reproducibility and relative validity of nutrient intakes obtained by this instrument.

    Methods

    The study was carried out from October 1991 to October 1992.

    During this period, 104 ten and women, aged 35-64 years, completed a 24-hour recall once a month, and the FFQ in the middle and at the end of this study.

    A short questionnaire on global consumption patterns was used to adjust the food consumption frequency given in the FFQ.

    Results

    Reproducibility correlations varied from 0.59 for saturated fat to 0.88 for alcohol, with most values falling between 0.60 and 0.70.

    Energy-adjustment decreased the observed correlations for all nutrients.

    Correlations between nutrient intake values from the 12-day average of dietary recalls and the FFQ corrected for food consumption frequency ranged from 0.42 for polyunsaturated fat to 0.88 for alcohol, followed by 0.65 for dietary fibres.

    After de-attenuation and energy-adjustment the range of correlations was somewhat wider (0.43-0. (...)

    Mots-clés Pascal : Consommation alimentaire, Comportement alimentaire, Questionnaire, Macroélément, Calorie, Validation test, Fidélité test, Méthodologie, Epidémiologie, Allemagne, Europe, Homme, Projet EPIC, Fréquence alimentaire

    Mots-clés Pascal anglais : Food intake, Feeding behavior, Questionnaire, Macronutrient(mineral), Calorie, Test validation, Test reliability, Methodology, Epidemiology, Germany, Europe, Human

    Logo du centre Notice produite par :
    Inist-CNRS - Institut de l'Information Scientifique et Technique

    Cote : 97-0263766

    Code Inist : 002B29A. Création : 11/06/1997.