Validity and Reproducibility of a Self-Administered Semi-Quantitative Food-Frequency Questionnaire for Estimating Usual Daily Fat, Fibre, Alcohol, Caffeine and Theobromine Intakes among Belgian Post-Menopausal Women

Selin Bolca, Inge Huybrechts, Mia Verschraegen, Stefaan De Henauw and Tom Van de Wiele
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Selin Bolca: Laboratory of Microbial Ecology and Technology (LabMET), Faculty of Bioscience Engineering, Ghent University, Coupure Links 653, B-9000 Ghent, Belgium
Inge Huybrechts: Department of Public Health, Ghent University, University Hospital 2BlokA, De Pintelaan 185, B-9000 Ghent, Belgium
Mia Verschraegen: Department of Nutrition and Dietetics, Faculty of Health Care Vesalius, University College Ghent, Keramiekstraat 80, B-9000 Ghent, Belgium
Stefaan De Henauw: Department of Public Health, Ghent University, University Hospital 2BlokA, De Pintelaan 185, B-9000 Ghent, Belgium
Tom Van de Wiele: Laboratory of Microbial Ecology and Technology (LabMET), Faculty of Bioscience Engineering, Ghent University, Coupure Links 653, B-9000 Ghent, Belgium

IJERPH, 2009, vol. 6, issue 1, 1-30

Abstract: A novel food-frequency questionnaire (FFQ) was developed and validated to assess the usual daily fat, saturated, mono-unsaturated and poly-unsaturated fatty acid, fibre, alcohol, caffeine, and theobromine intakes among Belgian post-menopausal women participating in dietary intervention trials with phyto-oestrogens. The relative validity of the FFQ was estimated by comparison with 7 day (d) estimated diet records (EDR, n 64) and its reproducibility was evaluated by repeated administrations 6 weeks apart ( n 79). Although the questionnaire underestimated significantly all intakes compared to the 7 d EDR, it had a good ranking ability ( r 0.47-0.94; weighted ? 0.25-0.66) and it could reliably distinguish extreme intakes for all the estimated nutrients, except for saturated fatty acids. Furthermore, the correlation between repeated administrations was high ( r 0.71-0.87) with a maximal misclassification of 7% (weighted ? 0.33-0.80). In conclusion, these results compare favourably with those reported by others and indicate that the FFQ is a satisfactorily reliable and valid instrument for ranking individuals within this study population.

Keywords: Food-frequency questionnaire; estimated diet record; validity; reproducibility; fat; fibre (search for similar items in EconPapers)
JEL-codes: I I1 I3 Q Q5 (search for similar items in EconPapers)
Date: 2009
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