Zero Irresponsible Drinking

Last registered on September 24, 2019


Trial Information

General Information

Zero Irresponsible Drinking
Initial registration date
September 24, 2019

Initial registration date is when the trial was registered.

It corresponds to when the registration was submitted to the Registry to be reviewed for publication.

First published
September 24, 2019, 11:40 AM EDT

First published corresponds to when the trial was first made public on the Registry after being reviewed.



Primary Investigator

Danish Center for Social Science Research

Other Primary Investigator(s)

Additional Trial Information

In development
Start date
End date
Secondary IDs
Harmful and irresponsible use of alcohol is a major risk factor for many diseases and injury conditions and is associated with both short- and long-term social consequences for young people. Peers, family members, authorities, and the alcohol industry influence the drinking culture and can play important roles in changing unhealthy irresponsible drinking behaviors. In this project, we design and evaluate an intervention aimed at changing the drinking culture and reducing irresponsible drinking among university students in Denmark. We conduct a randomized controlled trial at university level inviting students to answering a questionnaire including information on health behaviors before and after the intervention. The intervention has multiple components including information on behavior substitution, problem solving, and using a credible source; components that have shown promising results in previous studies (e.g., Kaner et al., 2017 and Norman et al., 2018).
External Link(s)

Registration Citation

Greve, Jane. 2019. "Zero Irresponsible Drinking." AEA RCT Registry. September 24.
Experimental Details


Intervention Start Date
Intervention End Date

Primary Outcomes

Primary Outcomes (end points)
Changes in drinking behavior measured by the AUDIT questionnaire.
B) Changes in drinking culture: 1) Self-reported information if they have been to a party without drinking 2) Self-reported information about the difficulties in saying no to alcohol 3) Self-reported information on drinks at the last Student bar event 4) Self-reported questions on non-alcoholic drinks at the last Student bar event.
Primary Outcomes (explanation)

Secondary Outcomes

Secondary Outcomes (end points)
Secondary Outcomes (explanation)

Experimental Design

Experimental Design
After answering the baseline questionnaire students are randomly allocated to either a treatment or a control group.
During the intervention period the treatment group will receive SMS’es and emails consisting of information aimed at affecting individual drinking behavior (see, e.g., Norman et al., 2018).
Experimental Design Details
Randomization Method
randomization is done by an computer.
Randomization Unit
Was the treatment clustered?

Experiment Characteristics

Sample size: planned number of clusters
We do not cluster.
Sample size: planned number of observations
500 students
Sample size (or number of clusters) by treatment arms
250 in the control group and 250 the treatment group.
Minimum detectable effect size for main outcomes (accounting for sample design and clustering)

Institutional Review Boards (IRBs)

IRB Name
Institutional Review Board of the Danish Centre for Social Science Research
IRB Approval Date
IRB Approval Number


Post Trial Information

Study Withdrawal

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Is the intervention completed?
Data Collection Complete
Data Publication

Data Publication

Is public data available?

Program Files

Program Files
Reports, Papers & Other Materials

Relevant Paper(s)

Reports & Other Materials