Reproducibility and validity of an FFQ developed for the Korea National Health and Nutrition Examination Survey (KNHANES).

ABSTRACT:

Objective

We aimed to evaluate the reproducibility and validity of the newly developed FFQ for the Korean National Health and Nutrition Examination Survey (KNHANES) and to estimate the measure's calibration factors.

Design

The 109-item FFQ was administered twice, approximately 9 months apart. We also collected four seasonal 3 d dietary records (DR) as a reference method. Correlation coefficients and joint classification were computed to compare intakes of energy, thirteen nutrients and eleven food groups between the two FFQ to evaluate reproducibility. For validity, de-attenuated and energy-adjusted correlation, joint classification and Bland-Altman statistics were calculated for energy and nutrients between the first FFQ and the DR. To calibrate the FFQ, we performed a line

SUBMITTER: Kim DW 

PROVIDER: S-EPMC10271806 | biostudies-literature | 2015 Jun

REPOSITORIES: biostudies-literature