Validity of a food frequency questionnaire to estimate long-chain polyunsaturated fatty acid intake among Japanese women in early and late pregnancy
Background: The relative validity of food frequency questionnaires for estimating long-chain polyunsaturated fatty acid (LC-PUFA) intake among pregnant Japanese women is currently unclear. The aim of this study was to verify the external validity of a food frequency questionnaire, originally develop...
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| Format: | Article |
| Language: | English |
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Japan Epidemiological Association
2017-01-01
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| Series: | Journal of Epidemiology |
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| Online Access: | http://www.sciencedirect.com/science/article/pii/S0917504016300223 |