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Langfield, T, Clarke, K, Marty, L, Jones, A and Robinson, E (2023) Socioeconomic position and the influence of food portion size on daily energy intake in adult females: two randomized controlled trials. International Journal of Behavioral Nutrition and Physical Activity, 20 (1). ISSN 1479-5868
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Socioeconomic position and the influence of food portion size on daily energy intake in adult females two randomized control.pdf - Published Version Available under License Creative Commons Attribution. Download (1MB) | Preview |
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Correction - socioeconomic position and the influence of food portion size on daily energy intake in adult females.pdf - Published Version Available under License Creative Commons Attribution. Download (1MB) | Preview |
Abstract
BACKGROUND: Reducing portion sizes of commercially available foods could be an effective public health strategy to reduce population energy intake, but recent research suggests that the effect portion size has on energy intake may differ based on socioeconomic position (SEP).
OBJECTIVE: We tested whether the effect of reducing food portion sizes on daily energy intake differed based on SEP. METHODS: Participants were served either smaller or larger portions of food at lunch and evening meals (N = 50; Study 1) and breakfast, lunch and evening meals (N = 46; Study 2) in the laboratory on two separate days, in repeated-measures designs. The primary outcome was total daily energy intake (kcal). Participant recruitment was stratified by primary indicators of SEP; highest educational qualification (Study 1) and subjective social status (Study 2), and randomisation to the order portion sizes were served was stratified by SEP. Secondary indicators of SEP in both studies included household income, self-reported childhood financial hardship and a measure accounting for total years in education.
RESULTS: In both studies, smaller (vs larger) meal portions led to a reduction in daily energy intake (ps < .02). Smaller portions resulted in a reduction of 235 kcal per day (95% CI: 134, 336) in Study 1 and 143 kcal per day (95% CI: 24, 263) in Study 2. There was no evidence in either study that effects of portion size on energy intake differed by SEP. Results were consistent when examining effects on portion-manipulated meal (as opposed to daily) energy intake. CONCLUSIONS: Reducing meal portion sizes could be an effective way to reduce overall daily energy intake and contrary to other suggestions it may be a socioeconomically equitable approach to improving diet.
TRIAL REGISTRATION: These trials were registered at www. CLINICALTRIALS: gov as NCT05173376 and NCT05399836.
| Item Type: | Article |
|---|---|
| Uncontrolled Keywords: | Humans; Diet; Energy Intake; Socioeconomic Factors; Adult; Child; Female; Meals; Portion Size; Energy intake; Food environment; Nudging; Portion control; Portion size; Socioeconomic position; Adult; Child; Female; Humans; Diet; Energy Intake; Meals; Portion Size; Socioeconomic Factors; 11 Medical and Health Sciences; 13 Education; Public Health |
| Subjects: | B Philosophy. Psychology. Religion > BF Psychology H Social Sciences > H Social Sciences (General) T Technology > TX Home economics > TX341 Nutrition. Foods and food supply |
| Divisions: | Psychology (from Sep 2019) |
| Publisher: | BIOMED CENTRAL LTD |
| SWORD Depositor: | A Symplectic |
| Date Deposited: | 10 May 2023 10:29 |
| Last Modified: | 13 Dec 2023 13:15 |
| DOI or ID number: | 10.1186/s12966-023-01453-x |
| URI: | https://researchonline.ljmu.ac.uk/id/eprint/19481 |
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