Dietary flavonoids and flavonoid-rich foods: validity and reproducibility of FFQ-derived intake estimates.

ABSTRACT:

Objective

To evaluate the validity and reproducibility of a 152-item semi-quantitative FFQ (SFFQ) for estimating flavonoid intakes.

Design

Over a 1-year period, participants completed two SFFQ and two weighed 7-d dietary records (7DDR). Flavonoid intakes from the SFFQ were estimated separately using Harvard (SFFQHarvard) and Phenol-Explorer (SFFQPE) food composition databases. 7DDR flavonoid intakes were derived using the Phenol-Explorer database (7DDRPE). Validity was assessed using Spearman's rank correlation coefficients deattenuated for random measurement error (rs), and reproducibility was assessed using rank intraclass correlation coefficients.

Setting

This validation study included primarily participants from two large observational cohort studies.

Participa

SUBMITTER: Yue Y 

PROVIDER: S-EPMC7736217 | biostudies-literature | 2020 Dec

REPOSITORIES: biostudies-literature