Reproducibility and relative validity of an extensive semi-quantitative food frequency questionnaire using dietary records and biochemical markers among Greek schoolteachers.
We evaluated the reproducibility and relative validity of a 190-item semi-quantitative food frequency questionnaire (FFQ) to be used in a large prospective study in the Athens area of Greece.
In all, 42 ten and 38 women, aged 25-67 years, completed two self-administered semi-quantitative FFQ spaced approximately 1 year apart.
Within this 1-year interval, participants visited the study centre monthly and completed an interviewer-administered 24-hour diet recall questionnaire.
We also collected two venous blood and three 24-hour urine samples from participants at randomly selected periods during the year between the two administrations of the dietary questionnaire.
Mean values for intake of most nutrients assessed by the two FFQ were in good agreement while those assessed by the two different dietary methods were reasonably similar for most nutrients.
Intraclass correlation coefficients for energy-adjusted nutrient intakes assessed by questionnaires one year apart averaged 0.57 (range 0.24-0.75) and were not substantially different between genders.
Correlation coefficients between the energy-adjusted nutrients measured by repeated 24-hour recalls and the semi-quantitative FFQ ranged from 0.25 for bêta-carotene and polyunsaturated fats to>0.50 for saturated fats, cis-linoleic acid, calcium and phosphorus (average : 0.46 for ten and 0.39 for women).
Reliability and relative validity were very high for alcohol intake. (...)
Mots-clés Pascal : Consommation alimentaire, Comportement alimentaire, Questionnaire, Validation test, Fidélité test, Méthodologie, Epidémiologie, Grèce, Europe, Homme, Enseignant
Mots-clés Pascal anglais : Food intake, Feeding behavior, Questionnaire, Test validation, Test reliability, Methodology, Epidemiology, Greece, Europe, Human, Teacher
Notice produite par :
Inist-CNRS - Institut de l'Information Scientifique et Technique
Cote : 97-0263647
Code Inist : 002B29A. Création : 11/06/1997.