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Publication type: Article in scientific journal
Type of review: Peer review (publication)
Title: Estimating dietary intake from grocery shopping data – a comparative validation of relevant indicators in Switzerland
Authors: Wu, Jing
Fuchs, Klaus
Lian, Jie
Haldimann, Mirella Lindsay
Schneider, Tanja
Mayer, Simon
Byun, Jaewook
Gassmann, Roland
Brombach, Christine
Fleisch, Elgar
et. al: No
DOI: 10.3390/nu14010159
Published in: Nutrients
Volume(Issue): 14
Issue: 1
Page(s): 159
Issue Date: Dec-2021
Publisher / Ed. Institution: MDPI
ISSN: 2072-6643
Language: English
Subjects: Food shopping quality indicator; FSA-NPS DI; Dietary intake; Diet monitoring; Digital receipt
Subject (DDC): 613.2: Dietetics
Abstract: In light of the globally increasing prevalence of diet-related chronic diseases, new scalable and non-invasive dietary monitoring techniques are urgently needed. Automatically collected digital receipts from loyalty cards hereby promise to serve as an objective and automatically traceable digital marker for individual food choice behavior and do not require users to manually log individual meal items. With the introduction of the General Data Privacy Regulation in the European Union, millions of consumers gained the right to access their shopping data in a machine-readable form, representing a historic chance to leverage shopping data for scalable monitoring of food choices. Multiple quantitative indicators for evaluating the nutritional quality of food shopping have been suggested, but so far, no comparison has validated the potential of these alternative indicators within a comparative setting. This manuscript thus represents the first study to compare the calibration capacity and to validate the discrimination potential of previously suggested food shopping quality indicators for the nutritional quality of shopped groceries, including the Food Standards Agency Nutrient Profiling System Dietary Index (FSA-NPS DI), Grocery Purchase Quality Index-2016 (GPQI), Healthy Eating Index-2015 (HEI-2015), Healthy Trolley Index (HETI) and Healthy Purchase Index (HPI), checking if any of them performs differently from the others. The hypothesis is that some food shopping quality indicators outperform the others in calibrating and discriminating individual actual dietary intake. To assess the indicators’ potentials, 89 eligible participants completed a validated food frequency questionnaire (FFQ) and donated their digital receipts from the loyalty card programs of the two leading Swiss grocery retailers, which represent 70% of the national grocery market. Compared to absolute food and nutrient intake, correlations between density based relative food and nutrient intake and food shopping data are stronger. The FSA-NPS DI has the best calibration and discrimination performance in classifying participants’ consumption of nutrients and food groups, and seems to be a superior indicator to estimate nutritional quality of a user’s diet based on digital receipts from grocery shopping in Switzerland.
Fulltext version: Published version
License (according to publishing contract): CC BY 4.0: Attribution 4.0 International
Departement: Life Sciences and Facility Management
Organisational Unit: Institute of Food and Beverage Innovation (ILGI)
Appears in collections:Publikationen Life Sciences und Facility Management

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