The Relative Validity and Reproducibility of Food Frequency Questionnaires in the China Kadoorie Biobank Study.

ABSTRACT: Short versions of qualitative and quantitative food frequency questionnaires (FFQs) are widely used to assess usual food intake. However, fewer studies evaluated their relative validity and reproducibility in the Chinese population. This study compared 12-day 24-h dietary recalls with qualitative and quantitative FFQs designed by the China Kadoorie Biobank (CKB) study to assess the relative validity. Two FFQs were administered in the second and third seasons and compared to evaluate the reproducibility. Statistical tests included Spearman correlation coefficients, weighted kappa, and cross-classification. A total of 432 participants were eligible after stratifying by age, sex, and four regions. In the validation of qualitative FFQ, adjusted Spearman coefficients were between 0.23 and 0.59,

SUBMITTER: Qin C 

PROVIDER: S-EPMC8879142 | biostudies-literature | 2022 Feb

REPOSITORIES: biostudies-literature