Validity of a self-administered food frequency questionnaire (FFQ) and its generalizability to the estimation of dietary folate intake in Japan
<p>Abstract</p> <p>Background</p> <p>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 intak...
| Main Authors: | , , , , |
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| Format: | Article |
| Language: | English |
| Published: |
BMC
2005-10-01
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| Series: | Nutrition Journal |
| Subjects: | |
| Online Access: | http://www.nutritionj.com/content/4/1/26 |