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Reliability and relative validity of a food frequency questionnaire to assess food group intakes in New Zealand adolescents

BACKGROUND: Due to the absence of a current and validated food frequency questionnaire (FFQ) for use in New Zealand adolescents, there is a need to develop one as a cost-effective way to assess adolescents’ food patterns. This study aims to examine the test-retest reliability and relative validity o...

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Autores principales: Wong, Jyh Eiin, Parnell, Winsome R, Black, Katherine E, Skidmore, Paula ML
Formato: Online Artículo Texto
Lenguaje:English
Publicado: BioMed Central 2012
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3495845/
https://www.ncbi.nlm.nih.gov/pubmed/22950540
http://dx.doi.org/10.1186/1475-2891-11-65
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author Wong, Jyh Eiin
Parnell, Winsome R
Black, Katherine E
Skidmore, Paula ML
author_facet Wong, Jyh Eiin
Parnell, Winsome R
Black, Katherine E
Skidmore, Paula ML
author_sort Wong, Jyh Eiin
collection PubMed
description BACKGROUND: Due to the absence of a current and validated food frequency questionnaire (FFQ) for use in New Zealand adolescents, there is a need to develop one as a cost-effective way to assess adolescents’ food patterns. This study aims to examine the test-retest reliability and relative validity of the New Zealand Adolescent FFQ (NZAFFQ) to assess food group intake in adolescents aged 14 to 18 years. METHODS: A non-quantitative (without portion size), 72-item FFQ was developed and pretested. Fifty-two participants (aged 14.9 ± 0.8 years) completed the NZAFFQ twice within a two-week period for test-retest reliability. Forty-one participants (aged 15.1 ± 0.9 years) completed a four-day estimated food record (4DFR) in addition to the FFQs to enable assessment of validity. Spearman’s correlations and cross-classification analyses were used to examine relative validity while intra-class correlations were additionally used for test-retest reliability. RESULTS: Weekly intakes were estimated for each food item and aggregated into 34 food groups. The median Spearman’s correlation coefficient (SCC) between FFQ administrations was 0.71. SCCs ranged from 0.46 for fruit juice or cordial to 0.87 for non-standard milk. The median intra-class correlation coefficient (ICC) between FFQ administrations was 0.69. The median SCC between food groups from the FFQ and the 4DFR was 0.40 with the highest SCC seen for standard milk (0.70). The exact agreement between the methods in ranking participants into thirds was highest for meat alternatives (78%), but lowest for red or yellow vegetables and potatoes (27%). The mean percent of participants misclassified into extreme thirds for food group intake was 12%. CONCLUSIONS: Despite a small sample size, the NZAFFQ exhibited good to excellent short-term test-retest reliability and reasonable validity in ranking the majority of the food group intakes among adolescents aged 14 to 18 years. The comparability of the validity to that in the current literature suggests that the NZAFFQ may be used among adolescent New Zealanders to identify dietary patterns and rank them according to food group intake.
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spelling pubmed-34958452012-11-13 Reliability and relative validity of a food frequency questionnaire to assess food group intakes in New Zealand adolescents Wong, Jyh Eiin Parnell, Winsome R Black, Katherine E Skidmore, Paula ML Nutr J Research BACKGROUND: Due to the absence of a current and validated food frequency questionnaire (FFQ) for use in New Zealand adolescents, there is a need to develop one as a cost-effective way to assess adolescents’ food patterns. This study aims to examine the test-retest reliability and relative validity of the New Zealand Adolescent FFQ (NZAFFQ) to assess food group intake in adolescents aged 14 to 18 years. METHODS: A non-quantitative (without portion size), 72-item FFQ was developed and pretested. Fifty-two participants (aged 14.9 ± 0.8 years) completed the NZAFFQ twice within a two-week period for test-retest reliability. Forty-one participants (aged 15.1 ± 0.9 years) completed a four-day estimated food record (4DFR) in addition to the FFQs to enable assessment of validity. Spearman’s correlations and cross-classification analyses were used to examine relative validity while intra-class correlations were additionally used for test-retest reliability. RESULTS: Weekly intakes were estimated for each food item and aggregated into 34 food groups. The median Spearman’s correlation coefficient (SCC) between FFQ administrations was 0.71. SCCs ranged from 0.46 for fruit juice or cordial to 0.87 for non-standard milk. The median intra-class correlation coefficient (ICC) between FFQ administrations was 0.69. The median SCC between food groups from the FFQ and the 4DFR was 0.40 with the highest SCC seen for standard milk (0.70). The exact agreement between the methods in ranking participants into thirds was highest for meat alternatives (78%), but lowest for red or yellow vegetables and potatoes (27%). The mean percent of participants misclassified into extreme thirds for food group intake was 12%. CONCLUSIONS: Despite a small sample size, the NZAFFQ exhibited good to excellent short-term test-retest reliability and reasonable validity in ranking the majority of the food group intakes among adolescents aged 14 to 18 years. The comparability of the validity to that in the current literature suggests that the NZAFFQ may be used among adolescent New Zealanders to identify dietary patterns and rank them according to food group intake. BioMed Central 2012-09-05 /pmc/articles/PMC3495845/ /pubmed/22950540 http://dx.doi.org/10.1186/1475-2891-11-65 Text en Copyright ©2012 Wong et al.; licensee BioMed Central Ltd. http://creativecommons.org/licenses/by/2.0 This is an Open Access article distributed under the terms of the Creative Commons Attribution License (http://creativecommons.org/licenses/by/2.0), which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
spellingShingle Research
Wong, Jyh Eiin
Parnell, Winsome R
Black, Katherine E
Skidmore, Paula ML
Reliability and relative validity of a food frequency questionnaire to assess food group intakes in New Zealand adolescents
title Reliability and relative validity of a food frequency questionnaire to assess food group intakes in New Zealand adolescents
title_full Reliability and relative validity of a food frequency questionnaire to assess food group intakes in New Zealand adolescents
title_fullStr Reliability and relative validity of a food frequency questionnaire to assess food group intakes in New Zealand adolescents
title_full_unstemmed Reliability and relative validity of a food frequency questionnaire to assess food group intakes in New Zealand adolescents
title_short Reliability and relative validity of a food frequency questionnaire to assess food group intakes in New Zealand adolescents
title_sort reliability and relative validity of a food frequency questionnaire to assess food group intakes in new zealand adolescents
topic Research
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3495845/
https://www.ncbi.nlm.nih.gov/pubmed/22950540
http://dx.doi.org/10.1186/1475-2891-11-65
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