ANZCTR - Registration

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Trial registered on ANZCTR

Registration number

ACTRN12616001323415

Ethics application status

Approved

Date submitted

28/10/2015

Date registered

22/09/2016

Date last updated

22/09/2016

Type of registration

Retrospectively registered

Titles & IDs

Public title

The MIDY pilot trial (Mobile Intervention for Drinking in Young people)

Scientific title

Evaluation of a mobile phone-based intervention to reduce alcohol consumption and harms in young adults

Secondary ID [1]

None

Universal Trial Number (UTN)

U1111-1175-8749

Trial acronym

MIDY

Linked study record

Health condition

Health condition(s) or problem(s) studied:

High risk alcohol consumption

Condition category

Condition code

Public Health

Health promotion/education

Intervention/exposure

Study type

Interventional

Description of intervention(s) / exposure

The intervention will be delivered on 6 drinking occasions (nights) over a 12 week period. The intervention will consist of hourly Ecological Momentary Assessments and feedback. While on a night out, participants will receive hourly reminders to complete a very brief questionnaire through an online survey accessed via the SMS message. The questionnaire will involve hourly reports of their alcohol consumption and spending, where they are, and their mood. They will then receive an individually tailored feedback message via SMS in response to these data, which aims to stop or slow down their drinking, or avoid harmful consequences of drinking. Participants will be sent a weekly reminder to register for any upcoming nights to do the trial, and adherence will be monitored through logs of completed questionnaires.

Intervention code [1]

Behaviour

Comparator / control treatment

The first control group will complete alcohol-related assessments while on a night out, but will not receive feedback SMS. A second control group will not have any contact during the study period.

Control group

Active

Outcomes

Primary outcome [1]

The main outcome measure will be the self-reported peak number of drinks consumed in a single occasion on the subject's most recent heavy drinking event in the past 3 months. This question is assessed through the question: "Think back over the last 3 months and try to recall the single occasion during this time period that you had the most drinks (i.e. your biggest drinking session in the past three months)."

This question has been previously used as a measure of peak single occasion consumption (see: Dietze, P. M., Livingston, M., Callinan, S., & Room, R. (2014). The big night out: What happens on the most recent heavy drinking occasion among young Victorian risky drinkers?. Drug and alcohol review, 33(4), 346-353.)

Timepoint [1]

Immediately following the 12 week study period.

Secondary outcome [1]

Proportion of participants that experience any alcohol harm at follow-up compared to baseline (derived from GenACIS, VYADS questionnaires)

Timepoint [1]