Reproducibility and validity of food group intake in a short food frequency questionnaire for the middle-aged Japanese population.

ABSTRACT:

Purpose

The purpose of this study was to evaluate the reproducibility and validity of a short food frequency questionnaire (FFQ) for food group intake in Japan, the reproducibility and partial validity of which were previously confirmed for nutrients.

Methods

A total of 288 middle-aged healthy volunteers from 11 different areas of Japan provided nonconsecutive 3-day weighed dietary records (DRs) at 3-month intervals over four seasons. We evaluated reproducibility based on the first (FFQ1) and second (FFQ2) questionnaires and their validity against the DRs by comparing the intake of 20 food groups. Spearman's rank correlation coefficients (SRs) were calculated between energy-adjusted intake from the FFQs and that from the DRs.

Results

The intake of 20 food groups estim

SUBMITTER: Imaeda N 

PROVIDER: S-EPMC7923820 | biostudies-literature | 2021 Mar

REPOSITORIES: biostudies-literature