SEP and the Impact of Portion Size on Daily Energy Intake

NCT05173376 | Completed

• 1 other identifier: 803194
• Study Type: interventional
• Target: 54
• Locations: 1 country
• Sites: 1

Brief Summary

Reducing food portion size is a potential strategy to reduce energy intake. There is some evidence to suggest that individuals with lower socioeconomic position (SEP) intend to eat more from larger portions, suggesting that the effect of portion size on food intake might vary by SEP. However, no study has tested this by measuring actual food intake. This study examines whether reductions to the portion size of components of a main meal will reduce daily energy intake, and whether and how socioeconomic position (higher vs lower) moderates the portion size effect. In a crossover experiment, participants will be served all meals in the lab on two separate days, with the portion size of main meal components at lunch and dinner manipulated (i.e. smaller on one day vs larger on the other day). All other foods offered are identical. Food intake from the portion-manipulated lunch and dinner, as well as all other meal components (breakfast, dessert, seconds, snacks) will be measured, and any additional food consumed by the participant will be measured using self-report, giving total daily energy intake (kcal).

Conditions

Diet, Healthy; Eating Behavior; Obesity

Keywords

portion size; socio-economic position; eating behaviour

Outcome Measures

Primary Outcomes (1)

• Daily energy intake

  Total energy (kcal) consumed from breakfast, lunch, dinner, dessert, snackbox, and any self-reported additional foods.

  24 hours after intervention administered

Secondary Outcomes (2)

• Appetite

  24 hours after intervention administered

• Moderate-vigorous physical activity

  24 hours after intervention administered

Study Arms (2)

Larger portions

EXPERIMENTAL

the main meal component (lunch/dinner) served to participants in the laboratory, reflecting 100% portion. All other foods are identical across conditions (e.g. sides, seconds, breakfast, dessert, snacks).

Behavioral: Portion size manipulation

Smaller portions

EXPERIMENTAL

the main meal component (lunch/dinner) served to participants in the laboratory, reflecting 66% portion (i.e. reduced portion size). All other foods are identical across conditions (e.g. sides, seconds, breakfast, dessert, snacks).

Behavioral: Portion size manipulation

Interventions

Portion size manipulation BEHAVIORAL

The intervention was administered via changing portion sizes of foods served to participants.

Larger portions; Smaller portions

Eligibility Criteria

• Age: 18 Years+
• Gender Eligibility Details: Identify as female
• Healthy Volunteers: Yes
• Age Groups: Adult (18-64), Older Adult (65+)

You may qualify if:

• Female
• UK (United Kingdom) residents, aged 18 or over
• Fluent in English
• willing to consume the test foods
• Self report liking of test foods
• BMI between 22.5 - 32.5kg2

You may not qualify if:

• taking medication which affects appetite
• currently pregnant
• history of eating disorders
• currently on a diet to lose weight
• food allergies, intolerances or specific dietary requirements (including being vegetarian or vegan)
• participated in 2018 Mood Study
• currently participating in another study where meals are provided

Sponsors & Collaborators

• University of Liverpool: lead
• European Research Council: collaborator

Study Sites (1)

University of Liverpool

Liverpool, L69 7ZA, United Kingdom

Location

Related Publications (1)

• Langfield T, Clarke K, Marty L, Jones A, Robinson E. Socioeconomic position and the influence of food portion size on daily energy intake in adult females: two randomized controlled trials. Int J Behav Nutr Phys Act. 2023 Apr 27;20(1):53. doi: 10.1186/s12966-023-01453-x.

  PMID: 37101143 DERIVED

MeSH Terms

Conditions

Feeding Behavior; Obesity

Condition Hierarchy (Ancestors)

Behavior, Animal; Behavior; Overweight; Overnutrition; Nutrition Disorders; Nutritional and Metabolic Diseases; Body Weight; Signs and Symptoms; Pathological Conditions, Signs and Symptoms

Study Officials

• Eric Robinson, PhD

  Study Principle Investigator

  PRINCIPAL INVESTIGATOR

Study Design

• Study Type: interventional
• Phase: not applicable
• Allocation: RANDOMIZED
• Masking: SINGLE
• Who Masked: PARTICIPANT
• Purpose: PREVENTION
• Intervention Model: CROSSOVER
• Sponsor Type: OTHER
• Responsible Party: PRINCIPAL INVESTIGATOR
• PI Title: Principal Investigator (Reader in Psychological Sciences)

Study Record Dates

• First Submitted: October 14, 2021
• First Posted: December 29, 2021
• Study Start: October 25, 2021
• Primary Completion: April 7, 2022
• Study Completion: April 7, 2022
• Last Updated: January 10, 2023

Record last verified: 2023-01

Data Sharing

• IPD Sharing: Will share
• Shared Documents: STUDY PROTOCOL, SAP
• Time Frame: On publication, indefinitely
• Access Criteria: Open website

Locations

GB (1)