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The validity of a food frequency questionnaire as a measure of PUFA status in pregnancy
BACKGROUND: Nutritional studies have found conflicting evidence regarding the ability of Food Frequency Questionnaires (FFQs) to demonstrate convergent validity with tissue content of omega-3 and omega-6 polyunsaturated fatty acids (PUFAs). We therefore sought to assess the convergent validity of a...
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/PMC4367853/ https://www.ncbi.nlm.nih.gov/pubmed/25885465 http://dx.doi.org/10.1186/s12884-015-0494-3 |
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author | Parker, Gordon McClure, Georgia Hegarty, Bronwyn D Smith, Isabelle Granville |
author_facet | Parker, Gordon McClure, Georgia Hegarty, Bronwyn D Smith, Isabelle Granville |
author_sort | Parker, Gordon |
collection | PubMed |
description | BACKGROUND: Nutritional studies have found conflicting evidence regarding the ability of Food Frequency Questionnaires (FFQs) to demonstrate convergent validity with tissue content of omega-3 and omega-6 polyunsaturated fatty acids (PUFAs). We therefore sought to assess the convergent validity of a FFQ strategy when compared with a blood biomarker of PUFA levels in a sample of pregnant women. METHOD: A previously validated PUFA FFQ was completed by 895 pregnant women and compared to erythrocyte membrane of six PUFA variables. RESULTS: Four of the six correlations were found to be formally significant, however two of these demonstrated minimal associational strength. Moderate-high correlations between the FFQ-derived PUFA intake estimates and blood biomarker PUFA levels were shown only for eicosapentaenoic acid (EPA; 0.55) and docosahexaenoic acid (DHA; 0.61). CONCLUSIONS: Overall, the correlations were lower than those found in general population studies. Findings suggest biological estimates, such as blood samples, may be most appropriate to measure PUFA levels above indirect strategies such as an FFQ in this population. The results, if an indirect strategy is unavoidable, indicate specific PUFAs where an FFQ strategy may be most informative. |
format | Online Article Text |
id | pubmed-4367853 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2015 |
publisher | BioMed Central |
record_format | MEDLINE/PubMed |
spelling | pubmed-43678532015-03-21 The validity of a food frequency questionnaire as a measure of PUFA status in pregnancy Parker, Gordon McClure, Georgia Hegarty, Bronwyn D Smith, Isabelle Granville BMC Pregnancy Childbirth Research Article BACKGROUND: Nutritional studies have found conflicting evidence regarding the ability of Food Frequency Questionnaires (FFQs) to demonstrate convergent validity with tissue content of omega-3 and omega-6 polyunsaturated fatty acids (PUFAs). We therefore sought to assess the convergent validity of a FFQ strategy when compared with a blood biomarker of PUFA levels in a sample of pregnant women. METHOD: A previously validated PUFA FFQ was completed by 895 pregnant women and compared to erythrocyte membrane of six PUFA variables. RESULTS: Four of the six correlations were found to be formally significant, however two of these demonstrated minimal associational strength. Moderate-high correlations between the FFQ-derived PUFA intake estimates and blood biomarker PUFA levels were shown only for eicosapentaenoic acid (EPA; 0.55) and docosahexaenoic acid (DHA; 0.61). CONCLUSIONS: Overall, the correlations were lower than those found in general population studies. Findings suggest biological estimates, such as blood samples, may be most appropriate to measure PUFA levels above indirect strategies such as an FFQ in this population. The results, if an indirect strategy is unavoidable, indicate specific PUFAs where an FFQ strategy may be most informative. BioMed Central 2015-03-18 /pmc/articles/PMC4367853/ /pubmed/25885465 http://dx.doi.org/10.1186/s12884-015-0494-3 Text en © Parker et al.; licensee BioMed Central. 2015 This is an Open Access article distributed under the terms of the Creative Commons Attribution License (http://creativecommons.org/licenses/by/4.0), which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly credited. The Creative Commons Public Domain Dedication waiver (http://creativecommons.org/publicdomain/zero/1.0/) applies to the data made available in this article, unless otherwise stated. |
spellingShingle | Research Article Parker, Gordon McClure, Georgia Hegarty, Bronwyn D Smith, Isabelle Granville The validity of a food frequency questionnaire as a measure of PUFA status in pregnancy |
title | The validity of a food frequency questionnaire as a measure of PUFA status in pregnancy |
title_full | The validity of a food frequency questionnaire as a measure of PUFA status in pregnancy |
title_fullStr | The validity of a food frequency questionnaire as a measure of PUFA status in pregnancy |
title_full_unstemmed | The validity of a food frequency questionnaire as a measure of PUFA status in pregnancy |
title_short | The validity of a food frequency questionnaire as a measure of PUFA status in pregnancy |
title_sort | validity of a food frequency questionnaire as a measure of pufa status in pregnancy |
topic | Research Article |
url | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4367853/ https://www.ncbi.nlm.nih.gov/pubmed/25885465 http://dx.doi.org/10.1186/s12884-015-0494-3 |
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