For the European Prospective Investigation into Cancer and Nutrition (EPIC) study Germany, a self-administered food frequency questionnaire (FFQ) was developed and tested for its relative validity and reproducibility in 1991/1992.
Study participants were 92 potential cohort members.
This paper reports results regarding retinol, carotenoids, tocopherols and ascorbic acid.
Study participants were invited to the study centre in Heidelberg once a month over one year.
At each visit, a 24-hour recall was obtained.
The FFQ was filled in twice with a 6-month interval (FFQ1, FFQ2).
In addition, a questionnaire on general consumption frequencies of 14 broad food groups was completed.
This information was combined with estimates derived from FFQ2 and frequency-corrected food and nutrient intakes were calculated (FFQcorr).
Blood specimens were taken in winter and summer 1992.
The intraclass correlation of the FFQ ranged from 0.65 to 0.67 for retinol, tocopherols, carotenoids, and ascorbic acid.
Intake of carotenoids by FFQcorr showed de-attenuated Pearson correlation coefficients with blood values in the order of 0.37, and with recall data of 0.44.
Respective correlations for retinol were 0.21 and 0.29, for tocopherols 0.18 and 0.52, and for ascorbic acid 0.36 and 0.69.
Errors of FFQcorr and 24-hour diet recalls were not correlated.
Mots-clés Pascal : Consommation alimentaire, Comportement alimentaire, Questionnaire, Epidémiologie, Méthodologie, Vitamine, Validation test, Allemagne, Europe, Homme, Projet EPIC, Fréquence alimentaire
Mots-clés Pascal anglais : Food intake, Feeding behavior, Questionnaire, Epidemiology, Methodology, Vitamin, Test validation, Germany, Europe, Human
Notice produite par :
Inist-CNRS - Institut de l'Information Scientifique et Technique
Cote : 97-0263937
Code Inist : 002B29A. Création : 11/06/1997.