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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

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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 κ 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 κ 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
validity, Food-frequency questionnaire, estimated diet record, reproducibility, fat, fibre

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MLA
Bolca, Selin et al. “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.” INTERNATIONAL JOURNAL OF ENVIRONMENTAL RESEARCH AND PUBLIC HEALTH 6.1 (2009): 121–150. Print.
APA
Bolca, S., Huybrechts, I., Verschraegen, M., De Henauw, S., & Van de Wiele, T. (2009). 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. INTERNATIONAL JOURNAL OF ENVIRONMENTAL RESEARCH AND PUBLIC HEALTH, 6(1), 121–150.
Chicago author-date
Bolca, Selin, Inge Huybrechts, Mia Verschraegen, Stefaan De Henauw, and Tom Van de Wiele. 2009. “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.” International Journal of Environmental Research and Public Health 6 (1): 121–150.
Chicago author-date (all authors)
Bolca, Selin, Inge Huybrechts, Mia Verschraegen, Stefaan De Henauw, and Tom Van de Wiele. 2009. “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.” International Journal of Environmental Research and Public Health 6 (1): 121–150.
Vancouver
1.
Bolca S, Huybrechts I, Verschraegen M, De Henauw S, Van de Wiele T. 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. INTERNATIONAL JOURNAL OF ENVIRONMENTAL RESEARCH AND PUBLIC HEALTH. 2009;6(1):121–50.
IEEE
[1]
S. Bolca, I. Huybrechts, M. Verschraegen, S. De Henauw, and T. Van de Wiele, “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,” INTERNATIONAL JOURNAL OF ENVIRONMENTAL RESEARCH AND PUBLIC HEALTH, vol. 6, no. 1, pp. 121–150, 2009.
@article{524907,
  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 κ 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 κ 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.},
  author       = {Bolca, Selin and Huybrechts, Inge and Verschraegen, Mia and De Henauw, Stefaan and Van de Wiele, Tom},
  issn         = {1661-7827},
  journal      = {INTERNATIONAL JOURNAL OF ENVIRONMENTAL RESEARCH AND PUBLIC HEALTH},
  keywords     = {validity,Food-frequency questionnaire,estimated diet record,reproducibility,fat,fibre},
  language     = {eng},
  number       = {1},
  pages        = {121--150},
  title        = {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},
  url          = {http://dx.doi.org/10.3390/ijerph6010121},
  volume       = {6},
  year         = {2009},
}

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