Relative validity of a semi-quantitative food-frequency questionnaire in an elderly Mediterranean population of Spain
Instituto de Salud Carlos III · Universitat Rovira i Virgili · +4 more institutions
Abstract
The aim of the present study was to assess reproducibility and relative validity of a self-administered FFQ used in the PREDIMED Study, a clinical trial for primary prevention of CVD by Mediterranean diet in a population at high cardiovascular risk. The FFQ was administered twice (FFQ1 and FFQ2) to explore reproducibility at 1 year. Four 3 d dietary records (DR) were used as reference to explore validity; participants therefore recorded their food intake over 12 d in the course of 1 year. The degree of misclassification in the FFQ was also evaluated by a contingency table of quintiles comparing the information from the FFQ2 and the DR. A total of 158 men and women (aged 55-80 years) were asked not to modify…
Citation impact
- FWCI
- 29.04
- Percentile
- 100%
- References
- 38
Authors
10- JFJoan Fernández‐BallartCorresponding
Instituto de Salud Carlos III, Universitat Rovira i Virgili
- JLJosep Lluís Piñol
Institut Català de la Salut
- IZItzíar Zazpe
Universidad de Navarra
- DCDolores Corella
Universitat de València, Instituto de Salud Carlos III
- PCPaula Carrasco
Universitat de València, Instituto de Salud Carlos III
Topics & keywords
- Intraclass correlation
- Reproducibility
- Medicine
- Food frequency questionnaire
- Mediterranean diet
- Food group
- Population
- Contingency table
- Zero hunger