Structural Validation of a French Food Frequency Questionnaire of 94 Items.

ABSTRACT:

Background

Food frequency questionnaires (FFQs) are used to estimate the usual food and nutrient intakes over a period of time. Such estimates can suffer from measurement errors, either due to bias induced by respondent's answers or to errors induced by the structure of the questionnaire (e.g., using a limited number of food items and an aggregated food database with average portion sizes). The "structural validation" presented in this study aims to isolate and quantify the impact of the inherent structure of a FFQ on the estimation of food and nutrient intakes, independently of respondent's perception of the questionnaire.

Methods

A semi-quantitative FFQ (n = 94 items, including 50 items with questions on portion sizes) and an associated aggregated food composition d

SUBMITTER: Gazan R 

PROVIDER: S-EPMC5742348 | biostudies-literature | 2017

REPOSITORIES: biostudies-literature