Pricing Interventions Based on Energy Content in Restaurants

Sponsor

University of Liverpool (Other)

Overall Status

Recruiting

CT.gov ID

NCT05818345

Collaborator

European Research Council (Other)

250

Enrollment

Locations

Arms

5.1

Anticipated Duration (Months)

125

Patients Per Site

24.7

Patients Per Site Per Month

Study Details

Study Description

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).

Condition or Disease	Intervention/Treatment	Phase
Obesity Healthy Diet Eating Behavior	Behavioral: Pricing intervention	N/A

Study Design

Study Type:

Interventional

Anticipated Enrollment :

250 participants

Allocation:

Randomized

Intervention Model:

Crossover Assignment

Masking:

Single (Participant)

Primary Purpose:

Prevention

Official Title:

Socioeconomic Position and the Effectiveness of a Pricing Intervention Based on Energy Content in Restaurants: a Real-world Experiment

Actual Study Start Date :

Mar 27, 2023

Anticipated Primary Completion Date :

Aug 28, 2023

Anticipated Study Completion Date :

Aug 28, 2023

Arms and Interventions

Arm	Intervention/Treatment
No Intervention: Control Participants will receive a standard menu with the existing pricing structure of the restaurant
Experimental: Pricing Intervention Participants will receive a menu where lower kcal dishes are discounted by 30%	Behavioral: Pricing intervention Participants will be provided with a menu with manipulated prices for products with lower kilocalories

Arm

Intervention/Treatment

No Intervention: Control

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

Experimental: Pricing Intervention

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

Behavioral: Pricing intervention

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

Outcome Measures

Primary Outcome Measures

Total kilocalories (kcal) ordered at the restaurant [1 hour]
The researchers will observe whether the total kcal ordered is different with a standard menu versus the menu with price manipulations
Total kcal consumed at the restaurant [1 hour]
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

Secondary Outcome Measures

Later kcal intake [10 hours]
The researchers will examine dietary intake the rest of the day following the restaurant visit to examine evidence of compensatory dietary intake.
Total sugar, fat and salt intake [1 hour]
The researchers will observe whether the total sugar, fat and salt ordered is different with a standard menu versus the menu with price manipulations

Eligibility Criteria

Criteria

Ages Eligible for Study:

18 Years and Older

Sexes Eligible for Study:

All

Accepts Healthy Volunteers:

Yes

Inclusion Criteria:

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

Exclusion Criteria:

No further exclusion criteria as it is a real-world study

Contacts and Locations

Locations

	Site	City	State	Country	Postal Code
1	University of Liverpool	Liverpool	Merseyside	United Kingdom	L69 7ZA
2	University of Liverpool	Liverpool		United Kingdom

Sponsors and Collaborators

University of Liverpool
European Research Council

Investigators

None specified.

Study Documents (Full-Text)

None provided.

More Information

Publications

None provided.

Responsible Party:

Eric Robinson, Professor, University of Liverpool

ClinicalTrials.gov Identifier:

NCT05818345

Other Study ID Numbers:

Restaurant Study

First Posted:

Apr 18, 2023

Last Update Posted:

Apr 18, 2023

Last Verified:

Apr 1, 2023

Individual Participant Data (IPD) Sharing Statement:

Yes

Plan to Share IPD:

Yes

Studies a U.S. FDA-regulated Drug Product:

Studies a U.S. FDA-regulated Device Product:

Study Results

No Results Posted as of Apr 18, 2023