SEP and the Impact of Portion Size on Daily Energy Intake

Obesity Clinical Trial

Official title:

Socioeconomic Position and the Effect of Portion Size Reduction: a 1-day Dietary Behaviour Experimental Study

Clinical Trial Details — Status: Completed

Administrative data

• NCT number: NCT05173376
• Other study ID #: 803194
• Status: Completed
• Phase: N/A
• Start date: October 25, 2021
• Est. completion date: April 7, 2022

Study information

• Verified date: January 2023
• Source: University of Liverpool
• Contact: n/a
• Is FDA regulated: No
• Study type: Interventional

Clinical Trial 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).

Description:

See attached protocol document.

Recruitment information / eligibility

• Status: Completed
• Enrollment: 54
• Est. completion date: April 7, 2022
• Est. primary completion date: April 7, 2022
• Accepts healthy volunteers: Accepts Healthy Volunteers
• Gender: Female
• Age group: 18 Years and older

Eligibility

Inclusion Criteria:

• 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

Exclusion Criteria:

• 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

Related Conditions & MeSH terms

• Diet, Healthy
• Eating Behavior
• Obesity

Intervention

Behavioral:
• Portion size manipulation
The intervention was administered via changing portion sizes of foods served to participants.

Locations

Country	Name	City	State
United Kingdom	University of Liverpool	Liverpool

Sponsors (2)

Lead Sponsor	Collaborator
University of Liverpool	European Research Council

Country where clinical trial is conducted

United Kingdom, 

Outcome

Type	Measure	Description	Time frame	Safety issue
Primary	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	Appetite	Hunger and fullness sensations before and after laboratory-based meals (self-reported on visual analogue scales anchored at 0 'Not at all' and 100 'Extremely')	24 hours after intervention administered
Secondary	Moderate-vigorous physical activity	Moderate-vigorous physical activity (recorded using wearable activity tracker), operationalised as active minutes/day (logged for activities with a metabolic equivalent of >/3)	24 hours after intervention administered