Investigating the Effects of Calorie Information and Serving Size of Alcohol Products on Alcohol Consumption.

NCT ID: NCT07103967

Last Updated: 2025-09-05

Study Results

Results pending

The study team has not published outcome measurements, participant flow, or safety data for this trial yet. Check back later for updates.

Basic Information

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Recruitment Status

RECRUITING

Clinical Phase

NA

Total Enrollment

450 participants

Study Classification

INTERVENTIONAL

Study Start Date

2025-07-30

Study Completion Date

2025-11-19

Brief Summary

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The present study aims to investigate whether alcohol consumption is reduced when participants are shown calorie information of alcohol products, compared with when calorie information is absent. We also wish to see whether alcohol consumption levels are reduced when changing the serving sizes available to participants.

Detailed Description

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We will examine the effect of alcohol calorie information on calorie and alcohol unit consumption in a semi-naturalistic real-world experiment by randomising pub quiz evenings to alcohol calorie information vs. absence of calorie information (control). Because current evidence for alcohol calorie information from online hypothetical choice experiments suggests any impact on alcohol consumption may be null or very small, we will compare and benchmark the size of any potential effect of alcohol calorie information to another public health alcohol intervention known to reduce alcohol consumption (alcohol serving size). We will achieve this by also randomizing evenings to normal sized servings of alcohol (control) vs. reduced serving sizes. In addition to examining effects of interventions on what people drink and eat during the pub quiz, we will examine alcohol and energy intake after the pub quiz to probe for potential compensatory behaviour in response to interventions. Because it is currently unclear how useful consumers find alcohol information when implemented in real-world conditions, we will also examine the extent to which participants perceive the interventions to be effective.

Conditions

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Obesity and Overweight Alcohol

Study Design

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Allocation Method

RANDOMIZED

Intervention Model

PARALLEL

Primary Study Purpose

TREATMENT

Blinding Strategy

NONE

Study Groups

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Calorie information present, serving size reduced

Participants will be presented with calorie information of alcohol products, and will have a restricted selection of serving sizes of drinks available to them.

Group Type EXPERIMENTAL

Calorie information manipulation

Intervention Type BEHAVIORAL

The intervention will be administered by changing the information presenting to participants at point-of-choice when ordering alcoholic drinks and bar snacks. When alcohol calorie information is present, participants will see the calorie content of alcohol products on menus and at other point-of-choice locations. When it is not present, this information will be absent.

Serving size manipulation

Intervention Type BEHAVIORAL

The intervention will be administered by changing the availability of alcoholic drinks. When serving sizes are reduced, participants will only be able to order 2/3 pint of 1/2 servings of beer, and 125 ml servings of wine. When serving sizes are not reduced, participants will be able to order 1 pint servings or 1/2 servings of beer, and 175 ml or 125 ml servings of wine.

Calorie information present, serving size typical

Participants will be presented with calorie information of alcohol products, and the serving sizes of drinks available to participants will not be manipulated.

Group Type EXPERIMENTAL

Calorie information manipulation

Intervention Type BEHAVIORAL

The intervention will be administered by changing the information presenting to participants at point-of-choice when ordering alcoholic drinks and bar snacks. When alcohol calorie information is present, participants will see the calorie content of alcohol products on menus and at other point-of-choice locations. When it is not present, this information will be absent.

Serving size manipulation

Intervention Type BEHAVIORAL

The intervention will be administered by changing the availability of alcoholic drinks. When serving sizes are reduced, participants will only be able to order 2/3 pint of 1/2 servings of beer, and 125 ml servings of wine. When serving sizes are not reduced, participants will be able to order 1 pint servings or 1/2 servings of beer, and 175 ml or 125 ml servings of wine.

Calorie information absent, serving size reduced

Participants will not be presented with calorie information of alcohol products, and will have a restricted selection of serving sizes of drinks available to them.

Group Type EXPERIMENTAL

Calorie information manipulation

Intervention Type BEHAVIORAL

The intervention will be administered by changing the information presenting to participants at point-of-choice when ordering alcoholic drinks and bar snacks. When alcohol calorie information is present, participants will see the calorie content of alcohol products on menus and at other point-of-choice locations. When it is not present, this information will be absent.

Serving size manipulation

Intervention Type BEHAVIORAL

The intervention will be administered by changing the availability of alcoholic drinks. When serving sizes are reduced, participants will only be able to order 2/3 pint of 1/2 servings of beer, and 125 ml servings of wine. When serving sizes are not reduced, participants will be able to order 1 pint servings or 1/2 servings of beer, and 175 ml or 125 ml servings of wine.

Calorie information absent, serving size typical

Participants will not be presented with calorie information of alcohol products, and the serving sizes of drinks available to participants will not be manipulated.

Group Type EXPERIMENTAL

Calorie information manipulation

Intervention Type BEHAVIORAL

The intervention will be administered by changing the information presenting to participants at point-of-choice when ordering alcoholic drinks and bar snacks. When alcohol calorie information is present, participants will see the calorie content of alcohol products on menus and at other point-of-choice locations. When it is not present, this information will be absent.

Serving size manipulation

Intervention Type BEHAVIORAL

The intervention will be administered by changing the availability of alcoholic drinks. When serving sizes are reduced, participants will only be able to order 2/3 pint of 1/2 servings of beer, and 125 ml servings of wine. When serving sizes are not reduced, participants will be able to order 1 pint servings or 1/2 servings of beer, and 175 ml or 125 ml servings of wine.

Interventions

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Calorie information manipulation

The intervention will be administered by changing the information presenting to participants at point-of-choice when ordering alcoholic drinks and bar snacks. When alcohol calorie information is present, participants will see the calorie content of alcohol products on menus and at other point-of-choice locations. When it is not present, this information will be absent.

Intervention Type BEHAVIORAL

Serving size manipulation

The intervention will be administered by changing the availability of alcoholic drinks. When serving sizes are reduced, participants will only be able to order 2/3 pint of 1/2 servings of beer, and 125 ml servings of wine. When serving sizes are not reduced, participants will be able to order 1 pint servings or 1/2 servings of beer, and 175 ml or 125 ml servings of wine.

Intervention Type BEHAVIORAL

Eligibility Criteria

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Inclusion Criteria

* Consume alcohol on a regular basis (at least one UK unit per week)
* Be aged 18 or over

Exclusion Criteria

* Have a current or previously diagnosed alcohol use disorder
Minimum Eligible Age

18 Years

Eligible Sex

ALL

Accepts Healthy Volunteers

Yes

Sponsors

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University of Liverpool

OTHER

Sponsor Role lead

Responsible Party

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Responsibility Role SPONSOR

Locations

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University of Liverpool

Liverpool, , United Kingdom

Site Status RECRUITING

Countries

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United Kingdom

Facility Contacts

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Thomas Gough

Role: primary

+447757285104

Other Identifiers

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AlcCal Real-world Study

Identifier Type: -

Identifier Source: org_study_id

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