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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Bibliografiske detaljer
Main Authors: Ishihara, Junko, Yamamoto, Seiichiro, Iso, Hiroyasu, Inoue, Manami, Tsugane, Shoichiro
Format: Artigo
Sprog:Inglês
Udgivet: BioMed Central 2005
Fag:
Research
Online adgang: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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