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Agreement level of vitamin D intake between food frequency questionnaire and 24-h food recall in young Qatari women
(
Emerald
, 2022 , Article)
Purpose – Prevalence of vitamin D insufficiency among young Qatari women is ∼85%. The purpose
of the study was to develop a food frequency questionnaire (FFQ) and to assess the degree of
agreement between food vitamin D ...
The Relative Validity and Reproducibility of Food Frequency Questionnaires in the China Kadoorie Biobank Study
(
MDPI
, 2022 , Article)
Background: 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 ...