Eating BehaviorNCT03241576
Provision of Small vs. Large Portion Sizes and Later Food Intake
A study testing Small portion size provision and Large portion size provision in people with Eating Behavior, run by University of Liverpool.
Trial summary
In 3 laboratory experiments the effect that receiving a small vs. large portion size of food has on later intake of that food was examined Read more about this study
- Who is it for?
- Ages 18 years and olderHealthy volunteers can take part
- Conditions the study is for
- Eating Behavior
- What is being tested?
- Small portion size provision and Large portion size provision
- Type of treatment
- Lifestyle or therapy programme
- Could I receive a placebo?
- No, everyone receives an active treatment
- How many people
- 307 participants
- Where
- No sites listed yet
- Study dates
- 1 May 2015to 1 Apr 2017
- 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
- 18 years or older
Who cannot join
- History of food allergy, eating disorder or currently dieting to lose weight
About this study
Official title: Provision of Small vs. Large Portion Sizes and Later Self-selected Food Intake: 3 Experimental Laboratory Studies in UK Participants
In 3 laboratory experiments the effect that receiving a small vs. large portion size of food has on later intake of that food was examined
Read the detailed description
Historical increases in the size of commercially available food products have been linked to the emergence of a worldwide obesity crisis. Although the acute effect portion size has on food intake is well established, the effect that exposure to smaller portion sizes has on future portion size selection is yet to be examined.We tested whether reducing a food portion size may 'renormalize' perceptions of what constitutes a normal amount of food to eat and result in people selecting and consuming smaller portions of that food in future. Across three experiments participants were served a large or smaller portion of food. In experiments 1-2, twenty four hours later participants freely selected and consumed a portion of that food. In experiment 3, one week later participants reported on their preferred portion size of that food.
- Conditions
- Eating Behavior
- Being tested
- Small portion size provision, Large portion size provision
- Medical subject headings
- Feeding Behavior
What participants receive
What participants receive. In a randomised study each person is assigned to one group by chance.
Small portion size provisionBehavioural
The intervention is the small meal size participants are provided with during a lunchtime session in the laboratory.
Large portion size provisionBehavioural
The intervention is the large meal size participants are provided with during a lunchtime session in the laboratory.
| Study group | Role | What they receive |
|---|---|---|
| Small portion size provision | Experimental | Participants in this arm are served a small serving of a lunchtime food to eat (session 1). Receives: Behavioral: Small portion size provision |
| Large portion size provision | Active comparator | Participants in this arm are served a large serving of a lunchtime food to eat (session 1). Receives: Behavioral: Large portion size provision |
What is being measured
The primary outcome is the main question the study is designed to answer.
Later food intake (24 hour)
Amount of the lunchtime food later chosen and consumed
Measured: Measured 24 hours after random allocation (experiments 1 and 2)
Later food intake (7 days)
Amount of the lunchtime food later chosen and consumed
Measured: Measured 7 days after allocation (experiment 3)
Timeline
From the start of the study to its completion; the mark is today. Estimated dates are the sponsor’s plan.
- First posted7 Aug 2017
- Study start1 May 2015
- Primary completion1 Apr 2017
- Study completion1 Apr 2017
Resources
- Official record on ClinicalTrials.govThe registry entry this page is built from, with its full change history.
- Publications (1)Papers the sponsor has linked to this study.
- Other trials for Eating BehaviorStudies 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
- Basic science
- Allocation
- Randomised
- Intervention model
- Parallel groups
- Masking
- None (open label)
- Enrolment
- 307 participants (actual)
Sponsor and investigators
- Lead sponsor
- University of Liverpool
- Sponsor type
- University, hospital or other
- Responsible party
- Principal investigator, Eric Robinson, University of Liverpool
IDs, dates and publications
- ClinicalTrials.gov ID
- NCT03241576
- Sponsor's protocol ID
- 463882A
- Status last verified
- Aug 2017
- First submitted
- 2 Aug 2017
- Last updated
- 7 Aug 2017
- Results posted
- No
- Data monitoring committee
- No
- FDA-regulated drug
- No
- FDA-regulated device
- No
- Individual data sharing
- Yes: Open science framework
Publications
Robinson E, Kersbergen I. Portion size and later food intake: evidence on the "normalizing" effect of reducing food portion sizes. Am J Clin Nutr. 2018 Apr 1;107(4):640-646. doi: 10.1093/ajcn/nqy013.
PubMed 29635503
Study at a glance
From the registry record, last updated by the sponsor on 7 Aug 2017. Recruitment status is as the sponsor reported it: confirm with the study team.
- Official title
- Provision of Small vs. Large Portion Sizes and Later Self-selected Food Intake: 3 Experimental Laboratory Studies in UK Participants
- ClinicalTrials.gov ID
- NCT03241576
- Acronym / sponsor ID
- 463882A
- Conditions
- Eating Behavior
- Study type
- Interventional
- Recruitment status
- Completed
- Enrolment
- 307 participants (actual)
- Lead sponsor
- University of LiverpoolUniversity, hospital or other
- Study start
- 1 May 2015 (actual)
- Primary completion
- 1 Apr 2017 (actual)
- Study completion
- 1 Apr 2017 (actual)
- First posted
- 7 Aug 2017 (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.
In 3 laboratory experiments the effect that receiving a small vs. large portion size of food has on later intake of that food was examined
Detailed description
Historical increases in the size of commercially available food products have been linked to the emergence of a worldwide obesity crisis. Although the acute effect portion size has on food intake is well established, the effect that exposure to smaller portion sizes has on future portion size selection is yet to be examined.We tested whether reducing a food portion size may 'renormalize' perceptions of what constitutes a normal amount of food to eat and result in people selecting and consuming smaller portions of that food in future. Across three experiments participants were served a large or smaller portion of food. In experiments 1-2, twenty four hours later participants freely selected and consumed a portion of that food. In experiment 3, one week later participants reported on their preferred portion size of that food.
Study design
- Primary purpose
- Basic science
- Allocation
- Randomised
- Intervention model
- Parallel groups
- Masking
- None (open label)
- Number of arms
- 2
| Arm | Type | Receives |
|---|---|---|
| Small portion size provision | Experimental | Behavioral: Small portion size provisionParticipants in this arm are served a small serving of a lunchtime food to eat (session 1). |
| Large portion size provision | Active comparator | Behavioral: Large portion size provisionParticipants in this arm are served a large serving of a lunchtime food to eat (session 1). |
Who may qualify
- Ages
- 18 years and older
- Sex
- All
- Healthy volunteers
- Accepted
- Age groups
- Adult, Older adult
Key inclusion criteria (1 listed)
- 18 years or older
Key exclusion criteria (1 listed)
- History of food allergy, eating disorder or currently dieting to lose weight
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 |
|---|---|---|
| Small portion size provisionThe intervention is the small meal size participants are provided with during a lunchtime session in the laboratory. | Behavioural | Small portion size provision |
| Large portion size provisionThe intervention is the large meal size participants are provided with during a lunchtime session in the laboratory. | Behavioural | Large portion size provision |
Primary outcome
Later food intake (24 hour)
Time frame: Measured 24 hours after random allocation (experiments 1 and 2)
Amount of the lunchtime food later chosen and consumed
Later food intake (7 days)
Time frame: Measured 7 days after allocation (experiment 3)
Amount of the lunchtime food later chosen and consumed
Results and safety
The study is completed, but results are not available in the source record. That does not mean the treatment did or did not work.
Research links
- Official record on ClinicalTrials.govLast updated by the sponsor 7 Aug 2017.
- Derived from this study: PubMed 29635503Robinson E, Kersbergen I. Portion size and later food intake: evidence on the "normalizing" effect of reducing food portion sizes. Am J Clin Nutr. 2018 Apr 1;107(4):640-646. doi: 10.1093/ajcn/nqy013.
- Individual participant dataSharing planned: Yes. Open science framework
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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.
Questions about this trial
What is this clinical trial studying?
A study testing Small portion size provision and Large portion size provision in people with Eating Behavior, run by University of Liverpool.
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: finished, as of the sponsor's last update on 7 Aug 2017. Status can change between updates, so confirm with the study contact before making plans.
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 is completed, but results are not available in the source record. That does not mean the treatment did or did not work.
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?
Later food intake (24 hour) (time frame: Measured 24 hours after random allocation (experiments 1 and 2)). 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?
On the ClinicalTrials.gov record for NCT03241576, which also lists 1 linked publication.
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 7 Aug 2017.