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Nutrients. 2020 Jan 6;12(1). pii: E160. doi: 10.3390/nu12010160.

Adaptation and Evaluation of Myfood24-Germany: A Web-Based Self-Administered 24-h Dietary Recall for the German Adult Population.

Author information

1
Nutritional Epidemiology, Department of Nutrition and Food Sciences, University of Bonn, 53115 Bonn, North Rhine-Westphalia, Germany.
2
Nutritional Epidemiology Group, School of Food Science and Nutrition, University of Leeds, Leeds LS2 9JT, UK.
3
Dietary Assessment Ltd., Nexus, University of Leeds, Leeds LS2 3AA, UK.

Abstract

Our aim was to develop and evaluate a German adaptation of myfood24, a fully automated, web-based 24-h dietary recall (24HDR). To complete a self-administered 24HDR with myfood24, users have to search and enter consumed foods within the underlying database by a free text search. The adaptation process thus mainly consisted of the development of an appropriate food database. myfood24-Germany was evaluated in 92 adults aged 17-78 years (study 1). Participants completed four non-consecutive 24HDRs and answered an evaluation questionnaire after the final recall. The System Usability Scale Score (SUS Score, 0-100) was calculated. Users' search behavior was examined with screen recordings in 15 adults aged 20-60 years (study 2). Participants had to enter three sample meals presented as food packaging or pictures. The final database included 11,501 food items (7203 generic and 4298 branded items) with up to 131 nutrients. In study 1, the median completion time for a 24HDR was 15 min. The median SUS score of 78 indicated good usability. The majority of participants considered the overall user-friendliness as good (46%) or very good (21%), and 75% were willing to use myfood24-Germany regularly. Both studies showed that finding and choosing an appropriate item within the database was a major challenge. A German version of myfood24 was successfully developed. The user evaluation indicated a short completion time, good usability and acceptability of the tool, and confirmed its feasibility for repeated short-term application.

KEYWORDS:

dietary assessment; epidemiological studies; myfood24; technology; web-based 24-h dietary recall

Conflict of interest statement

Professor Janet Cade is Director of Dietary Assessment Ltd. and led the development of myfood24 in the UK. Sarah Beer is employed by Dietary Assessment Ltd. and Neil Hancock is seconded part-time to Dietary Assessment Ltd. The funders had no role in the design of the study; in the collection, analyses, or interpretation of data; in the writing of the manuscript, or in the decision to publish the results.

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