We have evaluated the reproducibility and relative validity of a semiquantitative food frequency questionnaire (FFQ) used in a prospective study of risk factors for cervical neoplasia.
The questionnaire is a modified version of one developed and evaluated in a middle-aged Danish population.
In the present study, 122 women from the general population of Copenhagen, aged 20-29 years, completed the FFQ twice at a 1-year interval, and provided three 4-day dietary records during the intervening year.
The mean nutrient intakes calculated from the first and second questionnaire were similar and, for most nutrients, close to those obtained from the dietary records.
The Pearson correlation coefficients between the mean nutrient intakes from the two questionnaires ranged from 0.53 (95% CI, 0.39-0.65) for vitamin E to 0.76 (95% CI, 0.67-0.83) for vitamin B12 (median, 0.67 [95% CI, 0.56-0.76]). In comparisons between the second FFQ and the dietary records, the correlations ranged from 0.24 (95% CI, 0.07-0.40) for vitamin D to 0.63 (95% CI, 0.51-0.73) for sucrose (median, 0.42 (95% CI, 0.26-0.56]). The correlations between FFQ and dietary records were generally higher after adjustment for energy intake (median, 0.53 [95% CI, 0.39-0.65]) and within-person variability (median, 0.64 [95% CI, 0.52-0.73]). On average, 71% of the women were classified in the same (± 1) quintile in the second FFQ and the dietary records.
An average of 3. (...)
Mots-clés Pascal : Questionnaire, Consommation alimentaire, Comportement alimentaire, Validation test, Reproductibilité, Fidélité test, Autoévaluation, Adulte jeune, Homme, Femelle, Méthodologie, Epidémiologie, Nutrition, Fréquence alimentaire
Mots-clés Pascal anglais : Questionnaire, Food intake, Feeding behavior, Test validation, Reproducibility, Test reliability, Self evaluation, Young adult, Human, Female, Methodology, Epidemiology, Nutrition
Notice produite par :
Inist-CNRS - Institut de l'Information Scientifique et Technique
Cote : 97-0318765
Code Inist : 002B30A01A1. Création : 12/09/1997.