Validity of a self-administered food frequency questionnaire (FFQ) and its generalizability to the estimation of dietary folate intake in Japan

BACKGROUND: In an epidemiological study, it is essential to test the validity of the food frequency questionnaire (FFQ) for its ability to estimate dietary intake. The objectives of our study were to 1) validate a FFQ for estimating folate intake, and to identify the foods that contribute to inter-i...

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Autors principals: Ishihara, Junko, Yamamoto, Seiichiro, Iso, Hiroyasu, Inoue, Manami, Tsugane, Shoichiro
Format: Artigo
Idioma:Inglês
Publicat: BioMed Central 2005
Matèries:
Research
Accés en línia:https://ncbi.nlm.nih.gov/pmc/articles/PMC1277847/
https://ncbi.nlm.nih.gov/pubmed/16202175
https://ncbi.nlm.nih.govhttp://dx.doi.org/10.1186/1475-2891-4-26
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