Morris, MA orcid.org/0000-0002-9325-619X, Wilkins, EL, Galazoula, M et al. (2 more authors) (2020) Assessing diet in a university student population: A longitudinal food card transaction data approach. British Journal of Nutrition. ISSN 0007-1145
Abstract
Starting university is an important time with respect to dietary changes. This study reports a novel approach to assessing student diet by utilising student-level food transaction data to explore dietary patterns.
First year students living in catered accommodation at the University of Leeds (UK) received pre-credited food cards for use in University catering facilities. Food card transaction data were obtained for semester 1, 2016, and linked with student age and gender. K-means cluster analysis was applied to the transaction data to identify clusters of food purchasing behaviours. Differences in demographic and behavioural characteristics across clusters were examined using Chi-squared tests. The semester was divided into three time periods to explore longitudinal changes in purchasing patterns.
Seven dietary clusters were identified: ‘Vegetarian’, ‘Omnivores’, ‘Dieters’, ‘Dish of the Day’, ‘Grab-and-Go’, ‘Carb Lovers’ and ‘Snackers’. There were statistically significant differences in: gender (p<0.001) with women dominating the Vegetarian and Dieters; age (p = 0.003) with over 20's representing a high proportion of the Omnivores; and time of day of transactions (p<0.001) with Dieters and Snackers purchasing least at breakfast. Many students (n = 474, 60.4%) changed dietary cluster across the semester.
This study demonstrates that transactional data presents a feasible method for dietary assessment, collecting detailed dietary information over time and at scale, while eliminating participant burden and possible bias from self-selection, observation and attrition. It revealed that student diets are complex and that simplistic measures of diet, focussing on narrow food groups in isolation, are unlikely to adequately capture dietary behaviours.
Metadata
Item Type: | Article |
---|---|
Authors/Creators: |
|
Copyright, Publisher and Additional Information: | © The Authors 2020. This article has been published in a revised form in British Journal of Nutrition https://doi.org/10.1017/S0007114520000823. This version is free to view and download for private research and study only. Not for re-distribution, re-sale or use in derivative works. |
Keywords: | Student; Diet; Dietary patterns; Big data; Transactions |
Dates: |
|
Institution: | The University of Leeds |
Academic Units: | The University of Leeds > Faculty of Environment (Leeds) > School of Geography (Leeds) > Centre for Spatial Analysis & Policy (Leeds) |
Funding Information: | Funder Grant number ESRC (Economic and Social Research Council) ES/N00941X/1 ESRC (Economic and Social Research Council) ES/S007164/1 |
Depositing User: | Symplectic Publications |
Date Deposited: | 24 Feb 2020 11:41 |
Last Modified: | 27 Mar 2020 13:53 |
Status: | Published online |
Publisher: | Cambridge University Press |
Identification Number: | 10.1017/S0007114520000823 |
Open Archives Initiative ID (OAI ID): | oai:eprints.whiterose.ac.uk:157520 |