ObesityNCT05818345
Pricing Interventions Based on Energy Content in Restaurants
A study testing Pricing intervention in people with Obesity and Healthy Diet, run by University of Liverpool at 2 sites in United Kingdom.
Trial 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… Read more about this study
- Who is it for?
- Ages 18 years and olderHealthy volunteers can take part
- Conditions the study is for
- Obesity, Healthy Diet, Eating Behavior
- What is being tested?
- Pricing intervention
- Type of treatment
- Lifestyle or therapy programme
- Could I receive a placebo?
- No, everyone receives an active treatment
- How many people
- 100 participants
- Where
- 2 sitesUnited Kingdom
- Study dates
- 27 Mar 2023to 1 Jul 2023
- Phase
- Interventional
- Are there results?
- None posted in the registry
Key requirements
Who can take part, as listed by the sponsor. Only the study team can confirm whether you are eligible, so take this list to your doctor.
- Ages 18 years and older
- All sexes
- Healthy volunteers accepted
- Adult, Older adult
Who may be able to join
- 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
Who cannot join
- No further exclusion criteria as it is a real-world study
Trial locations and contacts
2 sites in 1 country.
United Kingdom2 sites
University of Liverpool
Liverpool, Merseyside, L69 7ZA
University of Liverpool
Liverpool
About this study
Official title: Socioeconomic Position and the Effectiveness of a Pricing Intervention Based on Energy Content in Restaurants: a Real-world Experiment
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
- Being tested
- Pricing intervention
- Medical subject headings
- Obesity, Feeding Behavior
What participants receive
What participants receive. In a randomised study each person is assigned to one group by chance.
Pricing interventionBehavioural
Participants will be provided with a menu with manipulated prices for products with lower kilocalories
| Study group | Role | What they receive |
|---|---|---|
| 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% Receives: Behavioral: Pricing intervention |
What is being measured
The primary outcome is the main question the study is designed to answer.
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
Measured: 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
Measured: 1 hour
Secondary outcomes (2)
Later kcal intake
The researchers will examine dietary intake the rest of the day following the restaurant visit to examine evidence of compensatory dietary intake.
Measured: 10 hours
Total sugar, fat and salt intake
The researchers will observe whether the total sugar, fat and salt ordered is different with a standard menu versus the menu with price manipulations
Measured: 1 hour
Timeline
From the start of the study to its completion; the mark is today. Estimated dates are the sponsor’s plan.
- First posted18 Apr 2023
- Study start27 Mar 2023
- Primary completion1 Jul 2023
- Study completion1 Jul 2023
Why it stopped: Restaurant has closed down
Resources
- Official record on ClinicalTrials.govThe registry entry this page is built from, with its full change history.
- Other trials for ObesityStudies of the same condition, open and under way.
- What the trial phases meanHow a treatment moves from first tests in people to approval.
More details
For doctors and researchers: how the study is designed, who runs it, and its registry IDs.
Study design
- Study type
- Interventional
- Phase
- Phase N/A
- Primary purpose
- Prevention
- Allocation
- Randomised
- Intervention model
- Crossover
- Masking
- Single blind
- Who is masked
- Participant
- Enrolment
- 100 participants (actual)
Sponsor and investigators
- Lead sponsor
- University of Liverpool
- Sponsor type
- University, hospital or other
- Collaborators
- European Research Council
- Responsible party
- Principal investigator, Eric Robinson, University of Liverpool
IDs, dates and publications
- ClinicalTrials.gov ID
- NCT05818345
- Sponsor's protocol ID
- Restaurant Study
- Status last verified
- Jul 2023
- First submitted
- 20 Mar 2023
- Last updated
- 21 Jul 2023
- Results posted
- No
- FDA-regulated drug
- No
- FDA-regulated device
- No
- Individual data sharing
- Yes: Study data (anonymised) will be shared on the Open Science Framework (OSF)
Study at a glance
From the registry record, last updated by the sponsor on 21 Jul 2023. Recruitment status is as the sponsor reported it: confirm with the study team.
- Official title
- Socioeconomic Position and the Effectiveness of a Pricing Intervention Based on Energy Content in Restaurants: a Real-world Experiment
- ClinicalTrials.gov ID
- NCT05818345
- Acronym / sponsor ID
- Restaurant Study
- Conditions
- Obesity, Healthy Diet, Eating Behavior
- Study type
- Interventional
- Recruitment status
- TerminatedReason stopped: Restaurant has closed down
- Enrolment
- 100 participants (actual)
- Lead sponsor
- University of LiverpoolUniversity, hospital or other
- Collaborators
- European Research Council
- Study start
- 27 Mar 2023 (actual)
- Primary completion
- 1 Jul 2023 (actual)
- Study completion
- 1 Jul 2023 (actual)
- First posted
- 18 Apr 2023 (actual)
- Results
- Not posted in the source record
Clinical summary
The research question as the sponsor registered it. This describes what the study plans to test, not what it found.
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).
Study design
- Primary purpose
- Prevention
- Allocation
- Randomised
- Intervention model
- Crossover
- Masking
- Single blind (participant)
- Number of arms
- 2
| Arm | Type | Receives |
|---|---|---|
| Control | No intervention | –Participants will receive a standard menu with the existing pricing structure of the restaurant |
| Pricing Intervention | Experimental | Behavioral: Pricing interventionParticipants will receive a menu where lower kcal dishes are discounted by 30% |
Who may qualify
- Ages
- 18 years and older
- Sex
- All
- Healthy volunteers
- Accepted
- Age groups
- Adult, Older adult
Key inclusion criteria (1 listed)
- 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
Key exclusion criteria (1 listed)
- No further exclusion criteria as it is a real-world study
Eligibility is decided by the study team after screening; this overview does not establish that a patient qualifies. Full inclusion and exclusion criteria.
Interventions
| Intervention | Type | Arms |
|---|---|---|
| Pricing interventionParticipants will be provided with a menu with manipulated prices for products with lower kilocalories | Behavioural | Pricing Intervention |
Primary outcome
Total kilocalories (kcal) ordered at the restaurant
Time frame: 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
Time frame: 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
2 secondary outcomes
Later kcal intake
Time frame: 10 hours
Total sugar, fat and salt intake
Time frame: 1 hour
Results and safety
The study was stopped early (reason given: Restaurant has closed down). Results are not available in the source record.
Research links
- Official record on ClinicalTrials.govLast updated by the sponsor 21 Jul 2023.
- Individual participant dataSharing planned: Yes. Study data (anonymised) will be shared on the Open Science Framework (OSF)
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Referral and contact
AzTrials does not enrol participants or take referrals. Contact the study team or a site listed below; they decide who can take part. This study is not recruiting at the moment.
The record lists no contact. Use the official record to reach the sponsor.
2 sites in 1 country: see every site and its status.
Questions about this trial
What is this clinical trial studying?
A study testing Pricing intervention in people with Obesity and Healthy Diet, run by University of Liverpool at 2 sites in United Kingdom.
The full registered description is in the About this study section and the official record.
Who may be eligible to take part?
The sponsor lists 1 inclusion and 1 exclusion criteria. Eligibility is decided by the study team after screening, so read the full criteria and contact a listed site.
Is this clinical trial currently recruiting?
The record says: stopped early, as of the sponsor's last update on 21 Jul 2023. Status can change between updates, so confirm with the study contact before making plans.
Where is the study taking place?
The record lists 2 sites in United Kingdom. Whether a site is taking part right now should be confirmed with that site. See every site.
What are the possible benefits and risks?
They depend on the study and the treatment, and no study can promise a benefit. The study team explains the known risks during informed consent, before anyone joins; the record itself does not list them.
Are results available for this study?
The study was stopped early (reason given: Restaurant has closed down). Results are not available in the source record.
How can a doctor refer a patient or contact the research team?
The record lists no contact. The official record names the sponsor, who can be asked directly. AzTrials does not enrol participants or take referrals.
What does the primary outcome measure?
Total kilocalories (kcal) ordered at the restaurant (time frame: 1 hour). The study lists 2 primary outcomes in all. It is what the study was designed to measure, not a finding.
Where can I read the original study information?
Does a listing mean the treatment is approved or proven to work?
No. A listing means the study is registered. It does not show that the treatment is safe, works, or is approved by a regulator.
How often is this information updated?
AzTrials copies changed records from ClinicalTrials.gov every night and reloads the whole registry every week. The sponsor last updated this record on 21 Jul 2023.