Bibliodieta is a free access platform or virtual library that offers Food Frequency Questionnaires (FFQ) used previously in studies with different Spanish populations.

The main objective of Bibliodieta is to provide a useful instrument for researchers interested in exploring relationships of diet-disease, as well as other research groups or institutions interested in assessing diet and nutritional status in a population.

Bibliodieta aims specifically at:

  • Diffusion of questionnaires suitable for every situation.
  • Fieldworker training in the use of questionnaires.
  • Analysis of information from Food Frequency Questionnaires (FFQ).
  • Assessment of other relevant exposures as physical activity, environmental pollutants, etc.
  • Collaboration on research studies or projects.

Questionnaire catalogue

The following FFQs are based on a questionnaire designed by Professor W. Willet of Harvard University for the Nurses’ Health Study (Willet et al. 1985).
The different versions of FFQs provided are adaptations and updates of the initial version of the FFQ of 93 items (Vioque 1991; 2006), which was drafted in the early 90s and was validated afterwards to use in a Spanish adult population (Valencian). Because of the changes in the food market and the experience from studies conducted, several FFQs are no longer available and the other FFQs have been adapted to circumstances and to each population. Therefore, we recommend researchers to contact us before using any FFQ in order to receive appropriate guidance.


1.- Willett WC, Sampson L, Stampfer MJ, Rosner B, Bain C, Witschi J, Hennekens CH, Speizer FE. Reproducibility and validity of a semiquantitative food frequency questionnaire. Am J Epidemiol 1985; 122: 51-65.

2.- Vioque J. Gonzalez L. Validity of a food frequency questionnaire (preliminary results). European Journal of Cancer Prevention 1991; 1 (sup 1): 19-20.

3.- Vioque J. Validez de la evaluación de la ingesta dietética. En: Serra Majem L y Aranceta Bartrina J.(editores). Nutrición y Salud Pública. Métodos, bases científicas y aplicaciones. 2ª edición. Barcelona, Masson-Elsevier 2006. pp 199-210. (ISBN: 84-458-1528-8)

4.-Vioque J, Navarrete-Muñoz EM, Gimenez-Monzó D, Hera MG, Granado F, Young IS, Ramón R, Ballester F, Murcia M, Rebagliato M, Iñiguez C. Reproducibility and validity of a food frequency questionnaire among pregnant women in a Mediterranean area.Nutr J. 2013;12:26

The following validation reference must be used in studies about carotenes and vitamin C:

5.- Vioque J, Weinbrenner T, Asensio L, Castelló A, Young IS, Fletcher A. Plasma concentrations of carotenoids and vitamin C are better correlated with dietary intake in normal weight than overweight and obese elderly subjects. Br J Nutr 2007; 97, 977–986.

12 December 2015