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Int. J. Environ. Res. Public Health 2017, 14(12), 1574; https://doi.org/10.3390/ijerph14121574

Development and Validation of the Brief Folate-Specific Food Frequency Questionnaire for Young Women’s Diet Assessment

1
Department of Dietetics, Faculty of Human Nutrition and Consumer Sciences, Warsaw University of Life Sciences (WULS-SGGW), 159c Nowoursynowska Street, 02-776 Warsaw, Poland
2
Department of Organization and Consumption Economics, Faculty of Human Nutrition and Consumer Sciences, Warsaw University of Life Sciences (WULS-SGGW), 159c Nowoursynowska Street, 02-776 Warsaw, Poland
*
Author to whom correspondence should be addressed.
Received: 13 October 2017 / Revised: 5 December 2017 / Accepted: 7 December 2017 / Published: 14 December 2017
(This article belongs to the Special Issue Maternal and Child Health 2018)
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Abstract

The tools enabling brief assessment of folate intake may be of great value for public health purposes. The aim of the presented study was to design a brief folate-specific food frequency questionnaire for Central and Eastern European population of women, as well as to assess the validity and reproducibility of the designed Folate-Intake Calculation-Food Frequency Questionnaire (Fol-IC-FFQ) on a group of Polish women aged 20–30 years. Participants collected 3-day dietary records and completed the Fol-IC-FFQ twice (FFQ1: directly after the dietary record; and FFQ2: six weeks later). The analysis included an assessment of validity (comparison of the results of FFQ1 and 3-day dietary record) and of reproducibility (comparison of the results of FFQ1 and FFQ2). In assessment of validity, a Bland-Altman index of 5.3% was observed. In assessment of reproducibility, a Bland-Altman index of 2.7% was observed, the share of individuals classified into the same intake adequacy category was over 85%, the share of individuals classified into the same tertile was almost 75%, the weighted κ statistic indicated substantial agreement (0.67) and correlation was significant (p = 0.0000; R = 0.7995). Assessment of the Fol-IC-FFQ revealed a satisfactory level of validity and very good level of reproducibility in the population of young Polish women. The Fol-IC-FFQ may be considered a valid tool for the assessment of folate intake in young Polish women and a promising tool for the assessment of folate intake in young women in Central and Eastern Europe. View Full-Text
Keywords: folate; food frequency questionnaire; validation study; validity; reproducibility; young women folate; food frequency questionnaire; validation study; validity; reproducibility; young women
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Głąbska, D.; Książek, A.; Guzek, D. Development and Validation of the Brief Folate-Specific Food Frequency Questionnaire for Young Women’s Diet Assessment. Int. J. Environ. Res. Public Health 2017, 14, 1574.

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