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Br J Nutr. 2016 Feb 28;115(4):681-6. doi: 10.1017/S0007114515004821. Epub 2015 Dec 11.

The acceptability of repeat Internet-based hybrid diet assessment of previous 24-h dietary intake: administration of the Oxford WebQ in UK Biobank.

Author information

1
1Cochrane Institute of Primary Care and Public Health,Cardiff University,5th Floor,Neuadd Meirionnydd,Heath Park,Cardiff CF14 4YS,UK.
2
2Clinical Trial Service Unit and Epidemiological Studies Unit,Nuffield Department of Population Health,University of Oxford,Richard Doll Building,Old Road Campus,Roosevelt Drive,Oxford OX3 7LF,UK.
3
3Cancer Epidemiology Unit,Nuffield Department of Population Health,University of Oxford,Richard Doll Building,Old Road Campus,Roosevelt Drive,Oxford OX3 7LF,UK.

Abstract

Although dietary intake over a single 24-h period may be atypical of an individual's habitual pattern, multiple 24-h dietary assessments can be representative of habitual intake and help in assessing seasonal variation. Web-based questionnaires are convenient for the participant and result in automatic data capture for study investigators. This study reports on the acceptability of repeated web-based administration of the Oxford WebQ--a 24-h recall of frequency from a set food list suitable for self-completion from which energy and nutrient values can be automatically generated. As part of the UK Biobank study, four invitations to complete the Oxford WebQ were sent by email over a 16-month period. Overall, 176 012 (53% of those invited) participants completed the online version of the Oxford WebQ at least once and 66% completed it more than once, although only 16% completed it on all four occasions. The response rate for any one round of invitations varied between 34 and 26%. On most occasions, the Oxford WebQ was completed on the same day that they received the invitation, although this was less likely if sent on a weekend. Participants who completed the Oxford WebQ tended to be white, female, slightly older, less deprived and more educated, which is typical of health-conscious volunteer-based studies. These findings provide preliminary evidence to suggest that repeated 24-h dietary assessment via the Internet is acceptable to the public and a feasible strategy for large population-based studies.

KEYWORDS:

Acceptability; Diet; Dietary assessment; Internet

PMID:
26652593
DOI:
10.1017/S0007114515004821
[Indexed for MEDLINE]

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