Author, as appears in the article.: Jorge Salas-Salvado; Joan D. Fernandez-Ballart; Josep Lluis Piñol; Itziar Zazpe; Dolores Corella; Paula Carrasco; Estefania Toledo; Manuel Perez-Bauer; Miguel Angel Martinez-Gonzalez; Jose M. Martin-Moreno
Department: Bioquímica i Biotecnologia
URV's Author/s: SALAS SALVADÓ, JORGE; Joan D. Fernandez-Ballart; Josep Lluis Piñol; Itziar Zazpe; Dolores Corella; Paula Carrasco; Estefania Toledo; Manuel Perez-Bauer; Miguel Angel Martinez-Gonzalez; Jose M. Martin-Moreno
Keywords: Validity reproducibility PREDIMED study
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 their dietary habits during the study period. Reproducibility for food groups, energy and nutrient intake, explored by the Pearson correlation coefficient (r) ranged 0.50-0.82, and the intraclass correlation coefficient (ICC) ranged from 0.63 to 0.90. The FFQ2 tended to report higher energy and nutrient intake than the DR. The validity indices of the FFQ in relation to the DR for food groups and energy and nutrient intake ranged (r) from 0.24 to 0.72, while the range of the ICC was between 0.40 and 0.84. With regard to food groups, 68-83 % of individuals were in the same or adjacent quintile in both methods, a figure which decreased to 55-75 % for energy and nutrient intake. We concluded that FFQ measurements had good reproducibility and a relative validity similar to those of FFQ used in other prospective studies.
Research group: Alimentació, Nutrició, Creixement i Salut Mental
Thematic Areas: Bioquímica i biotecnologia Bioquímica y tecnología Biochemistry and technology
licence for use: https://creativecommons.org/licenses/by/3.0/es/
ISSN: 0007-1145
Author identifier: N/D; N/D; N/D; N/D; N/D; N/D; N/D; N/D; N/D; N/D
Record's date: 2016-06-13
Last page: 1816
Journal volume: 103
Papper version: info:eu-repo/semantics/publishedVersion
Link to the original source: https://www.cambridge.org/core/journals/british-journal-of-nutrition/article/relative-validity-of-a-semiquantitative-foodfrequency-questionnaire-in-an-elderly-mediterranean-population-of-spain/AE602565052BA7B01EE799B4D9B3E8C4
Article's DOI: 10.1017/S0007114509993837
Entity: Universitat Rovira i Virgili
Journal publication year: 2010
First page: 1808
Publication Type: Article Artículo Article
Repositori URV