| Biochemical validation of a self-administered semi-quantitative food-frequency questionnaire. | |
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MedLine Citation:
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PMID: 7547847 Owner: NLM Status: MEDLINE |
Abstract/OtherAbstract:
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The present study is a biochemical validation of a food-frequency questionnaire (FFQ) with optical reading, i.e. containing food portion photographs to help to assess quantities. Forty-four healthy subjects, non-smokers and not taking vitamin supplements, were recruited for the study. After completion of the questionnaire, subjects were asked to keep a 7 d weighed dietary record (7DR). Three 24 h urine samples were collected on 3 different days over the week of food recording for the analysis of urea-N, P and K. On the 4th day of food recording, blood was collected for determination of alpha-tocopherol, beta-carotene and ascorbic acid. N, P and K determined in urines and from 7DR were significantly correlated (Spearman rank correlation test), r values being 0.77, 0.57 and 0.42 respectively. The correlations with the FFQ were significant only for N (r 0.45) and P (r 0.39). Blood ascorbic acid and beta-carotene concentrations correlated with dietary intake when determined from 7DR (both r 0.44), but not when determined from FFQ. No correlation was found for alpha-tocopherol. The data obtained seem to prove the validity of the FFQ in defining eating patterns in terms of some nutrients, but not vitamins, at least as far as non-supplemented subjects are concerned. The way in which foods were grouped in the questionnaire could account for these results. |
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Authors:
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M Porrini; M G Gentile; F Fidanza |
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Publication Detail:
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Type: Journal Article; Research Support, Non-U.S. Gov't |
Journal Detail:
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Title: The British journal of nutrition Volume: 74 ISSN: 0007-1145 ISO Abbreviation: Br. J. Nutr. Publication Date: 1995 Sep |
Date Detail:
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Created Date: 1995-11-21 Completed Date: 1995-11-21 Revised Date: 2006-11-15 |
Medline Journal Info:
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Nlm Unique ID: 0372547 Medline TA: Br J Nutr Country: ENGLAND |
Other Details:
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Languages: eng Pagination: 323-33 Citation Subset: IM |
Affiliation:
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Department of Food Science and Microbiology, University of Milan, Italy. |
Export Citation:
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| MeSH Terms | |
Descriptor/Qualifier:
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Adult Ascorbic Acid / blood Carotenoids / blood Diet Records* Eating* Female Humans Male Nitrogen / analysis Phosphorus / urine Potassium / urine Questionnaires Reproducibility of Results Urea / urine Vitamin E / blood beta Carotene |
| Chemical | |
Reg. No./Substance:
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1406-18-4/Vitamin E; 36-88-4/Carotenoids; 50-81-7/Ascorbic Acid; 57-13-6/Urea; 7235-40-7/beta Carotene; 7440-09-7/Potassium; 7723-14-0/Phosphorus; 7727-37-9/Nitrogen |
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
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