Impact of alcohol promoting and alcohol warning advertisements on alcohol consumption in heavy drinking young adults: a laboratory-based experiment

ISRCTN	ISRCTN11570646
DOI	https://doi.org/10.1186/ISRCTN11570646
Secondary identifying numbers	N/A

Submission date: 06/10/2015
Registration date: 12/10/2015
Last edited: 17/01/2017

Recruitment status: No longer recruiting
Overall study status: Completed
Condition category: Mental and Behavioural Disorders

Prospectively registered

Protocol

Statistical analysis plan

Results

Individual participant data

Plain English Summary

Background and study aims
Restricting or banning alcohol advertising may be a cost-effective way to reduce excessive drinking, but there is a lack of evidence to support this. Studies have indicated that exposure to alcohol advertising may increase alcohol consumption by small amounts, but previous research has focused mainly on moderate drinkers. There is some evidence suggesting that heavy drinkers may be particularly susceptible to the influence of alcohol advertising. As yet there has not been an adequately sized study to test the effect of viewing alcohol advertising on alcohol consumption among heavy drinkers specifically. Producing advertising that warns about the negative consequences of alcohol use is an additional strategy to reduce harmful alcohol consumption. There is limited evidence regarding whether viewing alcohol warning advertising is effective in reducing alcohol consumption, and there is some indication that heavy drinkers may actually be more likely to consume alcohol after viewing alcohol warnings. The main aim of this study is to estimate the immediate impact of viewing alcohol promoting and alcohol warning advertisements on alcohol consumption in young adult heavy drinkers. A secondary aim is to identify the psychological processes that might explain any observed effects.

Who can participate?
Young adults aged 18-25 who are heavy drinkers (i.e., score above a cut-off on a measure of typical alcohol consumption).

What does the study involve?
Participants attend a one-hour session in which they are randomly assigned to view either alcohol promoting adverts, alcohol warning adverts, or non-alcohol adverts, before being given the opportunity to consume alcoholic and non-alcoholic drinks in a taste test.

What are the possible benefits and risks of participating?
There are no specific benefits to taking part, other than having the opportunity to contribute to research, and the financial reimbursement for taking part (£35). There are no foreseeable risks of taking part in this study. We have attempted to minimise any discomfort, although participants may find some of the tasks a little uninteresting and some of the questions quite personal in nature.

Where is the study run from?
London South Bank University (UK)

When is study starting and how long is it expected to run for?
March 2014 to January 2016

Who is funding the study?
National Institute for Health Research School for Public Health Research and the Department of Health Policy Research Unit (UK)

Who is the main contact?
1. Prof Theresa Marteau (tm388@medschl.cam.ac.uk)
2. Dr Kaidy Stautz (ks704@medschl.cam.ac.uk)

Contact information

Dr Kaidy Stautz
Scientific

Behaviour and Health Research Unit
Institute of Public Health
University of Cambridge
Cambridge
CB2 0SR
United Kingdom

Prof Theresa Marteau
Public

Behaviour and Health Research Unit
Institute of Public Health
University of Cambridge
Cambridge
CB2 0SR
United Kingdom

Study information

Study design	Between-participants experimental design
Primary study design	Interventional
Secondary study design	Randomised controlled trial
Study setting(s)	Other
Study type	Prevention
Participant information sheet	Not available in web format, please use the contact details to request a patient information sheet
Scientific title	Impact of alcohol promoting and alcohol warning advertisements on alcohol consumption in heavy drinking young adults: a laboratory-based experiment
Study hypothesis	H1. Viewing alcohol promoting advertisements increases alcohol consumption in heavy drinkers. H2. Viewing alcohol warning advertisements increases alcohol consumption in heavy drinkers. H3. Stronger positive affective responses to advertisements partially mediate the effects hypothesised in H1 and H2. H4. Stronger implicit alcohol approach motivation and attentional bias towards alcohol partially mediate the effects hypothesised in H1 and H2. H5. Higher levels of exposure to alcohol-related advertising will result in greater alcohol consumption.
Ethics approval(s)	1. University of Cambridge Psychology Research Ethics Committee, 19/05/2015, ref: Pre.2015.032 2. London South Bank University Research Ethics Committee, 18/06/2015, ref: UREC 1534
Condition	Alcohol consumption
Intervention	Participants will be randomly assigned to one of three conditions: 1. Exposure to alcohol promoting advertisements 2. Exposure to alcohol warning advertisements 3. Exposure to non-alcohol advertisements (control condition)
Intervention type	Behavioural
Primary outcome measure	Alcohol consumption, calculated by measuring the volume (ml) of alcoholic and placebo alcoholic beverages remaining after completion of a taste test, and calculating amount consumed as a percentage of amount available. The taste test will be completed following exposure to advertisements.
Secondary outcome measures	1. Affective responses to advertisements will be assessed by subjective reports of pleasure (negative to positive) and arousal (relaxed to alert) whilst viewing advertisements 2. Implicit alcohol approach motivation will be assessed using an Implicit Association Test focusing on implicit approach versus avoidance of alcohol. This will be measured following exposure to advertisements and prior to the taste test 3. Attentional bias towards alcohol will be assessed using the Addiction-Stroop Test with alcohol-related words. This will be measured following exposure to advertisements and prior to the taste test
Overall study start date	02/03/2014
Overall study end date	29/01/2016

Eligibility

Participant type(s)	Healthy volunteer
Age group	Adult
Lower age limit	18 Years
Upper age limit	25 Years
Sex	Both
Target number of participants	204
Participant inclusion criteria	1. Current heavy alcohol user, defined as scoring 5 or above on the Alcohol Use Disorders Identification Test (AUDIT)-C 2. Aged 18-25
Participant exclusion criteria	1. Currently pregnant 2. Currently taking any medication, including antibiotics 3. Detectable levels of alcohol in breath on the test day (assessed by breathalyser)
Recruitment start date	14/07/2015
Recruitment end date	29/01/2016

Locations

Countries of recruitment

England
United Kingdom

Study participating centre

London South Bank University

SE1 6LN
United Kingdom

Sponsor information

University of Cambridge (UK)
University/education

Behaviour and Health Research Unit
Institute of Public Health
University of Cambridge
Cambridge
CB2 0SR
England
United Kingdom

"ROR"	https://ror.org/013meh722

Funders

Funder type

Government

National Institute for Health Research - School for Public Health Research (UK)

No information available

UK Department of Health Policy Research Program (UK)

No information available

Results and Publications

Intention to publish date
Individual participant data (IPD) Intention to share	No
IPD sharing plan summary	Not provided at time of registration
Publication and dissemination plan
IPD sharing plan

Study outputs

Output type	Details	Date created	Date added	Peer reviewed?	Patient-facing?
Results article	results	01/02/2017		Yes	No

Editorial Notes

17/01/2017: Publication reference added.