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Application and interpretation of multiple statistical tests to evaluate validity of dietary intake assessment methods

BACKGROUND: Several statistical tests are currently applied to evaluate validity of dietary intake assessment methods. However, they provide information on different facets of validity. There is also no consensus on types and combinations of tests that should be applied to reflect acceptable validit...

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Autores principales: Lombard, Martani J, Steyn, Nelia P, Charlton, Karen E, Senekal, Marjanne
Formato: Online Artículo Texto
Lenguaje:English
Publicado: BioMed Central 2015
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4471918/
https://www.ncbi.nlm.nih.gov/pubmed/25897837
http://dx.doi.org/10.1186/s12937-015-0027-y
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author Lombard, Martani J
Steyn, Nelia P
Charlton, Karen E
Senekal, Marjanne
author_facet Lombard, Martani J
Steyn, Nelia P
Charlton, Karen E
Senekal, Marjanne
author_sort Lombard, Martani J
collection PubMed
description BACKGROUND: Several statistical tests are currently applied to evaluate validity of dietary intake assessment methods. However, they provide information on different facets of validity. There is also no consensus on types and combinations of tests that should be applied to reflect acceptable validity for intakes. We aimed to 1) conduct a review to identify the tests and interpretation criteria used where dietary assessment methods was validated against a reference method and 2) illustrate the value of and challenges that arise in interpretation of outcomes of multiple statistical tests in assessment of validity using a test data set. METHODS: An in-depth literature review was undertaken to identify the range of statistical tests used in the validation of quantitative food frequency questionnaires (QFFQs). Four databases were accessed to search for statistical methods and interpretation criteria used in papers focusing on relative validity. The identified tests and interpretation criteria were applied to a data set obtained using a QFFQ and four repeated 24-hour recalls from 47 adults (18–65 years) residing in rural Eastern Cape, South Africa. RESULTS: 102 studies were screened and 60 were included. Six statistical tests were identified; five with one set of interpretation criteria and one with two sets of criteria, resulting in seven possible validity interpretation outcomes. Twenty-one different combinations of these tests were identified, with the majority including three or less tests. Coefficient of correlation was the most commonly used (as a single test or in combination with one or more tests). Results of our application and interpretation of multiple statistical tests to assess validity of energy, macronutrients and selected micronutrients estimates illustrate that for most of the nutrients considered, some outcomes support validity, while others do not. CONCLUSIONS: One to three statistical tests may not be sufficient to provide comprehensive insights into various facets of validity. Results of our application and interpretation of multiple statistical tests support the value of such an approach in gaining comprehensive insights in different facets of validity. These insights should be considered in the formulation of conclusions regarding validity to answer a particular dietary intake related research question.
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spelling pubmed-44719182015-06-19 Application and interpretation of multiple statistical tests to evaluate validity of dietary intake assessment methods Lombard, Martani J Steyn, Nelia P Charlton, Karen E Senekal, Marjanne Nutr J Research BACKGROUND: Several statistical tests are currently applied to evaluate validity of dietary intake assessment methods. However, they provide information on different facets of validity. There is also no consensus on types and combinations of tests that should be applied to reflect acceptable validity for intakes. We aimed to 1) conduct a review to identify the tests and interpretation criteria used where dietary assessment methods was validated against a reference method and 2) illustrate the value of and challenges that arise in interpretation of outcomes of multiple statistical tests in assessment of validity using a test data set. METHODS: An in-depth literature review was undertaken to identify the range of statistical tests used in the validation of quantitative food frequency questionnaires (QFFQs). Four databases were accessed to search for statistical methods and interpretation criteria used in papers focusing on relative validity. The identified tests and interpretation criteria were applied to a data set obtained using a QFFQ and four repeated 24-hour recalls from 47 adults (18–65 years) residing in rural Eastern Cape, South Africa. RESULTS: 102 studies were screened and 60 were included. Six statistical tests were identified; five with one set of interpretation criteria and one with two sets of criteria, resulting in seven possible validity interpretation outcomes. Twenty-one different combinations of these tests were identified, with the majority including three or less tests. Coefficient of correlation was the most commonly used (as a single test or in combination with one or more tests). Results of our application and interpretation of multiple statistical tests to assess validity of energy, macronutrients and selected micronutrients estimates illustrate that for most of the nutrients considered, some outcomes support validity, while others do not. CONCLUSIONS: One to three statistical tests may not be sufficient to provide comprehensive insights into various facets of validity. Results of our application and interpretation of multiple statistical tests support the value of such an approach in gaining comprehensive insights in different facets of validity. These insights should be considered in the formulation of conclusions regarding validity to answer a particular dietary intake related research question. BioMed Central 2015-04-22 /pmc/articles/PMC4471918/ /pubmed/25897837 http://dx.doi.org/10.1186/s12937-015-0027-y Text en © Lombard et al. 2015 This article is published under license to BioMed Central Ltd. 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
Lombard, Martani J
Steyn, Nelia P
Charlton, Karen E
Senekal, Marjanne
Application and interpretation of multiple statistical tests to evaluate validity of dietary intake assessment methods
title Application and interpretation of multiple statistical tests to evaluate validity of dietary intake assessment methods
title_full Application and interpretation of multiple statistical tests to evaluate validity of dietary intake assessment methods
title_fullStr Application and interpretation of multiple statistical tests to evaluate validity of dietary intake assessment methods
title_full_unstemmed Application and interpretation of multiple statistical tests to evaluate validity of dietary intake assessment methods
title_short Application and interpretation of multiple statistical tests to evaluate validity of dietary intake assessment methods
title_sort application and interpretation of multiple statistical tests to evaluate validity of dietary intake assessment methods
topic Research
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4471918/
https://www.ncbi.nlm.nih.gov/pubmed/25897837
http://dx.doi.org/10.1186/s12937-015-0027-y
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