Validity and reproducibility of folate and vitamin B<sub>12 </sub>intakes estimated from a self-administered diet history questionnaire in Japanese pregnant women
<p>Abstract</p> <p>Background</p> <p>No validated dietary questionnaire for assessing folate and vitamin B<sub>12 </sub>intakes during pregnancy is available in Japan. We evaluated the validity and reproducibility of intakes of folate and vitamin B<sub>...
| Main Authors: | , , , , , |
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| Format: | Article |
| Language: | English |
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BMC
2012-03-01
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| Series: | Nutrition Journal |
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| Online Access: | http://www.nutritionj.com/content/11/1/15 |
| _version_ | 1818485314995355648 |
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| author | Shiraishi Mie Haruna Megumi Matsuzaki Masayo Murayama Ryoko Sasaki Satoshi Murashima Sachiyo |
| author_facet | Shiraishi Mie Haruna Megumi Matsuzaki Masayo Murayama Ryoko Sasaki Satoshi Murashima Sachiyo |
| author_sort | Shiraishi Mie |
| collection | DOAJ |
| description | <p>Abstract</p> <p>Background</p> <p>No validated dietary questionnaire for assessing folate and vitamin B<sub>12 </sub>intakes during pregnancy is available in Japan. We evaluated the validity and reproducibility of intakes of folate and vitamin B<sub>12 </sub>estimated from a self-administered diet history questionnaire (DHQ) in Japanese pregnant women.</p> <p>Methods</p> <p>A sample of 167 healthy subjects with singleton pregnancies in the second trimester was recruited at a private obstetric hospital in metropolitan Tokyo from June to October 2008 (n = 76), and at a university hospital in Tokyo from June 2010 to June 2011 (n = 91). The dietary intakes of folate and vitamin B<sub>12 </sub>were assessed using the DHQ. The serum concentrations of folate and vitamin B<sub>12 </sub>were measured as reference values in the validation study. To assess the reproducibility of the results, 58 pregnant women completed the DHQ twice within 4-5 week interval.</p> <p>Results</p> <p>Significantly positive correlations were found between energy-adjusted intakes and serum concentrations of folate and vitamin B<sub>12 </sub>(r = 0.286, <it>p </it>< 0.001 and r = 0.222, <it>p </it>= 0.004, respectively). After excluding the participants with nausea (n = 121), the correlation coefficient for vitamin B<sub>12 </sub>increased to 0.313 (<it>p </it>= 0.001). When participants were classified into quintiles based on intakes and serum concentrations of folate and vitamin B<sub>12 </sub>, approximately 60% were classified in the same or adjacent quintile. The intraclass correlation coefficients of the two-time DHQ were 0.725 for folate and 0.512 for vitamin B<sub>12 </sub>.</p> <p>Conclusion</p> <p>The present study indicated that the DHQ had acceptable validity and reproducibility for assessing folate and vitamin B<sub>12 </sub>intakes in Japanese pregnant women.</p> |
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| institution | Directory Open Access Journal |
| issn | 1475-2891 |
| language | English |
| last_indexed | 2024-12-10T16:07:01Z |
| publishDate | 2012-03-01 |
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| spelling | doaj.art-f1372097d9b041ce91d09980e5a74bff2022-12-22T01:42:13ZengBMCNutrition Journal1475-28912012-03-011111510.1186/1475-2891-11-15Validity and reproducibility of folate and vitamin B<sub>12 </sub>intakes estimated from a self-administered diet history questionnaire in Japanese pregnant womenShiraishi MieHaruna MegumiMatsuzaki MasayoMurayama RyokoSasaki SatoshiMurashima Sachiyo<p>Abstract</p> <p>Background</p> <p>No validated dietary questionnaire for assessing folate and vitamin B<sub>12 </sub>intakes during pregnancy is available in Japan. We evaluated the validity and reproducibility of intakes of folate and vitamin B<sub>12 </sub>estimated from a self-administered diet history questionnaire (DHQ) in Japanese pregnant women.</p> <p>Methods</p> <p>A sample of 167 healthy subjects with singleton pregnancies in the second trimester was recruited at a private obstetric hospital in metropolitan Tokyo from June to October 2008 (n = 76), and at a university hospital in Tokyo from June 2010 to June 2011 (n = 91). The dietary intakes of folate and vitamin B<sub>12 </sub>were assessed using the DHQ. The serum concentrations of folate and vitamin B<sub>12 </sub>were measured as reference values in the validation study. To assess the reproducibility of the results, 58 pregnant women completed the DHQ twice within 4-5 week interval.</p> <p>Results</p> <p>Significantly positive correlations were found between energy-adjusted intakes and serum concentrations of folate and vitamin B<sub>12 </sub>(r = 0.286, <it>p </it>< 0.001 and r = 0.222, <it>p </it>= 0.004, respectively). After excluding the participants with nausea (n = 121), the correlation coefficient for vitamin B<sub>12 </sub>increased to 0.313 (<it>p </it>= 0.001). When participants were classified into quintiles based on intakes and serum concentrations of folate and vitamin B<sub>12 </sub>, approximately 60% were classified in the same or adjacent quintile. The intraclass correlation coefficients of the two-time DHQ were 0.725 for folate and 0.512 for vitamin B<sub>12 </sub>.</p> <p>Conclusion</p> <p>The present study indicated that the DHQ had acceptable validity and reproducibility for assessing folate and vitamin B<sub>12 </sub>intakes in Japanese pregnant women.</p>http://www.nutritionj.com/content/11/1/15Diet history questionnairePregnant womenValidationFolateVitamin B<sub>12</sub> |
| spellingShingle | Shiraishi Mie Haruna Megumi Matsuzaki Masayo Murayama Ryoko Sasaki Satoshi Murashima Sachiyo Validity and reproducibility of folate and vitamin B<sub>12 </sub>intakes estimated from a self-administered diet history questionnaire in Japanese pregnant women Nutrition Journal Diet history questionnaire Pregnant women Validation Folate Vitamin B<sub>12</sub> |
| title | Validity and reproducibility of folate and vitamin B<sub>12 </sub>intakes estimated from a self-administered diet history questionnaire in Japanese pregnant women |
| title_full | Validity and reproducibility of folate and vitamin B<sub>12 </sub>intakes estimated from a self-administered diet history questionnaire in Japanese pregnant women |
| title_fullStr | Validity and reproducibility of folate and vitamin B<sub>12 </sub>intakes estimated from a self-administered diet history questionnaire in Japanese pregnant women |
| title_full_unstemmed | Validity and reproducibility of folate and vitamin B<sub>12 </sub>intakes estimated from a self-administered diet history questionnaire in Japanese pregnant women |
| title_short | Validity and reproducibility of folate and vitamin B<sub>12 </sub>intakes estimated from a self-administered diet history questionnaire in Japanese pregnant women |
| title_sort | validity and reproducibility of folate and vitamin b sub 12 sub intakes estimated from a self administered diet history questionnaire in japanese pregnant women |
| topic | Diet history questionnaire Pregnant women Validation Folate Vitamin B<sub>12</sub> |
| url | http://www.nutritionj.com/content/11/1/15 |
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