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Validation of the Oxford WebQ Online 24-hour dietary questionnaire using biomarkers

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Title: Validation of the Oxford WebQ Online 24-hour dietary questionnaire using biomarkers
Authors: Greenwood, DC
Hardie, LJ
Frost, GS
Alwan, NA
Bradbury, KE
Carter, M
Elliott, P
Evans, CEL
Ford, HE
Hancock, N
Key, TJ
Liu, B
Morris, MA
Mulla, UZ
Petropoulou, K
Potter, GDM
Riboli, E
Young, H
Wark, PA
Cade, JE
Item Type: Journal Article
Abstract: Oxford WebQ is an online dietary questionnaire covering 24 hours, appropriate for repeated administration in large-scale prospective studies including UK Biobank and the Million Women Study. We compared performance of the Oxford WebQ and a traditional interviewer-administered multi-pass 24-hour recall against biomarkers for protein, potassium and total sugar intake, and total energy expenditure estimated by accelerometry. 160 participants were recruited between 2014 and 2016 in London, UK, and measured at 3 non-consecutive time-points. The measurement error model simultaneously compared all 3 methods. Attenuation factors for protein, potassium, sugars and total energy intake estimated by the mean of 2 Oxford WebQs were 0.37, 0.42, 0.45, and 0.31 respectively, with performance improving incrementally for the mean of more measures. Correlation between the mean of 2 Oxford WebQs and estimated true intakes, reflecting attenuation when intake is categorised or ranked, was 0.47, 0.39, 0.40, and 0.38 respectively, also improving with repeated administration. These were similar to the more administratively burdensome interviewer-based recall. Using objective biomarkers as the standard, Oxford WebQ performs well across key nutrients in comparison with more administratively burdensome interviewer-based 24-hour recalls. Attenuation improves when the average is taken over repeated administration, reducing measurement error bias in assessment of diet-disease associations.
Issue Date: 1-Oct-2019
Date of Acceptance: 3-Jul-2019
URI: http://hdl.handle.net/10044/1/71858
DOI: 10.1093/aje/kwz165
ISSN: 1476-6256
Publisher: Oxford University Press (OUP)
Start Page: 1858
End Page: 1867
Journal / Book Title: American Journal of Epidemiology
Volume: 188
Issue: 10
Copyright Statement: © The Author(s) 2019. Published by Oxford University Press on behalf of the Johns Hopkins Bloomberg School of Public Health. 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 reuse, distribution, and reproduction in any medium, provided the original work is properly cited.
Sponsor/Funder: Medical Research Council (MRC)
Imperial College Healthcare NHS Trust- BRC Funding
National Institute for Health Research
Medical Research Council (MRC)
Funder's Grant Number: G1100235
RDF03
RTJ6219303-1
MR/L01341X/1
Keywords: Million Women Study
UK Biobank
diet questionnaires
dietary assessment
nutrition assessment
recall
recovery biomarkers
validation
Epidemiology
11 Medical and Health Sciences
01 Mathematical Sciences
Publication Status: Published
Online Publication Date: 2019-07-18
Appears in Collections:School of Public Health