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A comparison of food portion size estimation by older adults, young adults and nutritionists

Timon, CM; Cooper, SE; Barker, ME; Astell, AJ; Adlam, T; Hwang, F; Williams, EA; (2018) A comparison of food portion size estimation by older adults, young adults and nutritionists. The journal of nutrition, health & aging (JNHA) , 22 (2) pp. 230-236. 10.1007/s12603-017-0937-9. Green open access

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Abstract

Objectives To investigate the ability of older adults, younger adults and nutritionists to assess portion size using traditional methods versus a computer-based method. This was to inform the development of a novel dietary assessment method for older adults “The NANA system”. Design Older and younger adults assessed the portion size of self-served portions of foods from a buffet style set up using traditional and computerised portion size assessment aids. Nutritionists assessed the portion size of foods from digital photographs using computerised portion size aids. These estimates were compared to known weights of foods using univariate analyses of covariance (ANCOVA). Setting The University of Sheffield, United Kingdom. Subjects Forty older adults (aged 65 years and over), 41 younger adults (aged between 18 and 40 years) and 25 nutritionists. Results There was little difference in the abilities of older and younger adults to assess portion size using both assessment aids with the exception of small pieces morphology. Even though the methods were not directly comparable among the test groups, there was less variability in portion size estimates made by the nutritionists. Conclusion Older adults and younger adults are similar in their ability to assess food portion size and demonstrate wide variability of estimation compared to the ability of nutritionists to estimate portion size from photographs. The results suggest that the use of photographs of meals consumed for portion size assessment by a nutritionist may improve the accuracy of dietary assessment. Improved portion size assessment aids are required for all age groups.

Type: Article
Title: A comparison of food portion size estimation by older adults, young adults and nutritionists
Open access status: An open access version is available from UCL Discovery
DOI: 10.1007/s12603-017-0937-9
Publisher version: https://doi.org/10.1007/s12603-017-0937-9
Language: English
Additional information: This article is distributed under the terms of the Creative Commons Attribution 4.0 International License (http://creativecommons.org/licenses/by/4.0/), which permits use, duplication, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license and indicate if changes were made.
Keywords: Science & Technology, Life Sciences & Biomedicine, Geriatrics & Gerontology, Nutrition & Dietetics, Portion size assessment, older adults, young adults, nutritionists, DIETARY ASSESSMENT, PHOTOGRAPHY, ACCURACY, RELIABILITY, VALIDATION, VALIDITY, SYSTEM, NANA
UCL classification: UCL
UCL > Provost and Vice Provost Offices
UCL > Provost and Vice Provost Offices > UCL BEAMS
UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Engineering Science
UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Engineering Science > Dept of Computer Science
URI: https://discovery.ucl.ac.uk/id/eprint/10110181
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