Condition category
Not Applicable
Date applied
26/05/2020
Date assigned
31/05/2020
Last edited
28/05/2020
Prospective/Retrospective
Retrospectively registered
Overall trial status
Completed
Recruitment status
No longer recruiting
Publication status
Results overdue

Plain English Summary

Background and study aims
Excessive alcohol consumption amongst youths, especially students, poses serious health and risk problems. Research suggests that the serving-size of glasses in which alcohol is consumed may influence both the amounts poured, perceptions of portion size, drinking pace as well as purchasing and consumption behaviour. The aim of this study is to examine the impact of reducing the standard serving size, including size of glass, of beer by 20% on on-site beer consumption by students in a student bar.

Who can participate?
Guests at a large student dormitory bar in Copenhagen, Denmark

What does the study involve?
Beer glasses of two different sizes are placed in a random sequence under the bar desk. The students are either served free beer with a standard 50 cl serving size or a smaller 40 cl serving size during the first 2.5 hours of the student event. Consumption is measured by writing the students’ names on their glasses and then videotaping the glasses served from cameras placed underneath the bar desk and monitoring the students throughout the night.

What are the possible benefits and risks of participating?
The possible benefits and risks are that participants might get tipsy.

Where is the study run from?
Roskilde University (Denmark)

When is the study starting and how long is it expected to run for?
The study took place in April 2017

Who is funding the study?
Investigator initiated and funded

Who is the main contact?
Pelle Guldborg Hansen
pgh@ruc.dk

Trial website

Contact information

Type

Scientific

Primary contact

Mr Pelle Guldborg Hansen

ORCID ID

https://orcid.org/0000-0002-0042-0852

Contact details

Hammers Høi Kaj
4
5.th.
Copenhagen
1402
Denmark
+45 (0)2789 8789
pgh@ruc.dk

Additional identifiers

EudraCT number

Nil known

ClinicalTrials.gov number

Nil known

Protocol/serial number

BEER1

Study information

Scientific title

Does the serving-size of beer glasses matter for how much students drink on a night out? A randomised controlled field experiment

Acronym

BEER

Study hypothesis

This experiment aimed to examine the impact of reducing the standard serving-size, including size of glass, of beer with 20% on on-site beer consumption by students in a student bar. The hypothesis was that the intervention would lead to a reduction.

Ethics approval

Approved 25/05/2020, The Committee for Research Ethics, Roskilde University (Institute for Communication Studies and Arts, Roskilde University, Universitetsvej 1, Bld. 42.1, 4000 Roskilde, Denmark; +45 (0)4674 2445; Ryberg@ruc.dk), no ref. number

Study design

Randomised controlled field experiment

Primary study design

Interventional

Secondary study design

Randomised controlled trial

Trial setting

Other

Trial type

Prevention

Patient information sheet

Not available

Condition

Excessive alcohol consumption

Intervention

At a regular quiz night in a large student dormitory bar in Copenhagen, Denmark, beer glasses of two different sizes are placed in a randomised sequence under the bar desk. This allowed for randomly allocating the 103 participating students into two groups either served free beer with standard 50 cl serving size (n = 54) or smaller 40 cl serving size (n = 49) during the first 2.5 hours of the student event. Consumption is measured by writing the students’ names on their glasses and then videotaping the glasses served from cameras placed underneath the bar desk and monitoring the students throughout the night.

Intervention type

Behavioural

Phase

Drug names

Primary outcome measure

Beer served measured in centiliters by having bartenders pour beer to a particular line on the beer glasses and recording this with go-pro cameras during the first 2.5 hours of the student event

Secondary outcome measures

There are no secondary outcome measures

Overall trial start date

20/04/2017

Overall trial end date

20/04/2017

Reason abandoned (if study stopped)

Eligibility

Participant inclusion criteria

Guests at a dormitory bar

Participant type

Healthy volunteer

Age group

Adult

Gender

Both

Target number of participants

103

Total final enrolment

103

Participant exclusion criteria

Does not meet inclusion criteria

Recruitment start date

20/04/2017

Recruitment end date

20/04/2017

Locations

Countries of recruitment

Denmark

Trial participating centre

Roskilde University
Universitetsvej 1
Roskilde
4000
Denmark

Sponsor information

Organisation

Roskilde University

Sponsor details

Universitetsvej 1
Roskilde
4000
Denmark
+45 (0)4674 2000
ruc@ruc.dk

Sponsor type

University/education

Website

https://ruc.dk

Funders

Funder type

Other

Funder name

Investigator initiated and funded

Alternative name(s)

Funding Body Type

Funding Body Subtype

Location

Results and Publications

Publication and dissemination plan

Intended to be published in BMC Public Health.

IPD sharing statement
The datasets generated during and/or analysed during the current study are/will be available upon request from Pelle Guldborg Hansen (pgh@ruc.dk). Type of dataset: Excel. The data will be available as long as required conditional on an academic affiliation as a full-time researcher for all types of analyses. No need for consent from participants will be needed as the data is fully anonymised.

Intention to publish date

01/06/2020

Participant level data

Available on request

Basic results (scientific)

Publication list

Publication citations

Additional files

Editorial Notes

28/05/2020: Trial's existence confirmed by The Committee for Research Ethics, Roskilde University.