Relative Validity and Reproducibility of a Web-Based Semi-Quantitative Food Frequency Questionnaire in the Danish Diet, Cancer, and Health-Next Generations MAX Study.

ABSTRACT: The food frequency questionnaire (FFQ) is designed to capture an individual's habitual dietary intake and is the most applied method in nutritional epidemiology. Our aim was to assess the relative validity and reproducibility of the FFQ used in the Diet, Cancer, and Health-Next Generations cohort (DCH-NG). We included 415 Danish women and men aged 18-67 years. Spearman's correlations coefficients, Bland-Altman limits of agreement and cross-classification between dietary intakes estimated from the FFQ administered at baseline (FFQ_baseline), and the mean of three 24-h dietary recalls (24-HDRs) and the FFQ administered after 12 months (FFQ_{12 months}) were determined. Nutrient intakes were energy-adjusted by Nutrient Density and Residual methods. Correlation coefficients r

SUBMITTER: Rostgaard-Hansen AL 

PROVIDER: S-EPMC10222214 | biostudies-literature | 2023 May

REPOSITORIES: biostudies-literature