Pricing Interventions Based on Energy Content in Restaurants

NCT05818345 | Terminated

• 1 other identifier: Restaurant Study
• Study Type: interventional
• Target: 100
• Locations: 1 country
• Sites: 2

Brief Summary

The goal of this clinical trial is to examine the impact of price decreases based on energy content in a full-service restaurant on immediate dietary consumption (in terms of kilocalories (kcals), sugar, fat, and salt intake) and dietary consumption the rest of the day following the intervention; and whether the intervention effects differ based on socioeconomic position (SEP). Participants will be asked to visit the restaurant twice. At visit 1, participants will receive a control study menu with the existing pricing structure of the restaurant. At visit 2, participants will receive the same study menu with the pricing intervention introduced. For comparative purposes a smaller subgroup of participants will receive the control menu at both visit 1 and 2 to allow the researchers to estimate whether any pre-post changes occur in the absence of a pricing intervention (and whether change differs by SEP).

Conditions

Obesity; Healthy Diet; Eating Behavior

Outcome Measures

Primary Outcomes (2)

• Total kilocalories (kcal) ordered at the restaurant

  The researchers will observe whether the total kcal ordered is different with a standard menu versus the menu with price manipulations

  1 hour

• Total kcal consumed at the restaurant

  The researchers will observe whether the total kcal consumed (taking into account leftovers and food sharing) is different with a standard menu versus the menu with price manipulations

  1 hour

Secondary Outcomes (2)

• Later kcal intake

  10 hours

• Total sugar, fat and salt intake

  1 hour

Study Arms (2)

Control

NO INTERVENTION

Participants will receive a standard menu with the existing pricing structure of the restaurant

Pricing Intervention

EXPERIMENTAL

Participants will receive a menu where lower kcal dishes are discounted by 30%

Behavioral: Pricing intervention

Interventions

Pricing intervention BEHAVIORAL

Participants will be provided with a menu with manipulated prices for products with lower kilocalories

Pricing Intervention

Eligibility Criteria

• Age: 18 Years+
• Sex: all
• Healthy Volunteers: Yes
• Age Groups: Adult (18-64), Older Adult (65+)

You may qualify if:

• UK resident, aged 18 and older, fluent in English, have an out-of-home meal at least once a month and have no dietary allergies

Sponsors & Collaborators

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

Study Sites (2)

University of Liverpool

Liverpool, Merseyside, L69 7ZA, United Kingdom

Location

University of Liverpool

Liverpool, United Kingdom

Location

MeSH Terms

Conditions

Obesity; Feeding Behavior

Condition Hierarchy (Ancestors)

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

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: Professor

Study Record Dates

• First Submitted: March 20, 2023
• First Posted: April 18, 2023
• Study Start: March 27, 2023
• Primary Completion: July 1, 2023
• Study Completion: July 1, 2023
• Last Updated: July 21, 2023

Record last verified: 2023-07

Data Sharing

• IPD Sharing: Will share
• Shared Documents: STUDY PROTOCOL, SAP, ICF
• Time Frame: On publication, indefinitely

Locations

GB (2)