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Reproducibility and relative validity of a semi-quantitative food frequency questionnaire for Chinese pregnant women
BACKGROUND: Food frequency questionnaire (FFQ) is a reliable tool to estimate dietary intake in large nutritional epidemiological studies, but there is lack of a current and validated FFQ for use in urban Chinese pregnant women. This study aimed to evaluate the reproducibility and validity of a semi...
Autores principales: | , , , , , , , , , , , , |
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Formato: | Online Artículo Texto |
Lenguaje: | English |
Publicado: |
BioMed Central
2015
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Materias: | |
Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4457005/ https://www.ncbi.nlm.nih.gov/pubmed/26040544 http://dx.doi.org/10.1186/s12937-015-0044-x |