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Reproducibility and Validity of a Food Frequency Questionnaire to Measure the Consumption of β-Carotene, β-Cryptoxanthin, Folate, Vitamin D, EPA, and DHA
OBJECTIVES: The authors assessed the reproducibility and validity of a 166-item semi-quantitative food frequency questionnaire (SFFQ) for a Japanese population, focusing on carotenoids, vitamin D, folate, and fatty acids. Foods for the questionnaire were chosen with a focus on nutrients associated w...
Autores principales: | , , |
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Formato: | Online Artículo Texto |
Lenguaje: | English |
Publicado: |
Oxford University Press
2022
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Materias: | |
Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9194199/ http://dx.doi.org/10.1093/cdn/nzac067.083 |