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
Study website
Contact information
Type
Scientific
Contact name
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/CTIS number
Nil known
IRAS number
ClinicalTrials.gov number
Nil known
Secondary identifying numbers
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(s)
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
Study setting(s)
Other
Study 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
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 study start date
20/04/2017
Overall study end date
20/04/2017
Reason abandoned (if study stopped)
Eligibility
Participant inclusion criteria
Guests at a dormitory bar
Participant type(s)
Healthy volunteer
Age group
Adult
Sex
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
Study 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
ROR
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.
Intention to publish date
01/06/2020
Individual participant data (IPD) Intention to share
Yes
IPD sharing plan
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.
IPD sharing plan summary
Available on request
Study outputs
| Output type | Details | Date created | Date added | Peer reviewed? | Patient-facing? |
|---|