What is the Active Ingredient in Personalized Feedback Interventions for Problem Drinkers? A Randomized Controlled Trial

Study Overview
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Brief Summary
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The major objective of this project is to conduct a randomized controlled trial comparing the impact of the normative feedback and other personalized feedback components of the Check Your Drinking (CYD) Internet-based intervention in the general population. Eligible problem drinking participants will be randomly assigned to one of four conditions in a 2 by 2 design - to receive just the normative feedback component of the CYD intervention, just the other personalized feedback information, to a no intervention control condition, or to receive the full CYD intervention. The no intervention control condition will not be sent any intervention materials but will instead be sent a list of the different components of the CYD feedback and will be asked to think about how useful they would find each of them. All participants will be followed-up at 3 months.

Official Title
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What is the Active Ingredient in Personalized Feedback Interventions for Problem Drinkers? A Randomized Controlled Trial

Conditions
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Problem Drinking

Intervention / Treatment
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* Behavioral: Check Your Drinking (CYD) personalized feedback intervention


Participation Criteria
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Eligibility Criteria
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Inclusion Criteria: problem drinkers as measured by an AUDIT score of 8 or more Exclusion Criteria: none

Ages Eligible for Study
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Minimum Age: 19 Years

Sexes Eligible for Study
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All

Accepts Healthy Volunteers
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No

Study Plan
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How is the study designed?
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Design Details

Primary Purpose: Treatment
Allocation: Randomized
Intervention Model: Factorial Assignment
Masking: Single


Arms and Interventions

| Participant Group/Arm | Intervention/Treatment |
| --- | --- |
| Experimental: Full personalized feedback<br>Participant provided with the full CYD personalized feedback summary. | Behavioral: Check Your Drinking (CYD) personalized feedback intervention<br>* The CYD provides problem drinkers with a personalized summary of their drinking that compares his or her drinking with that of the general population. The CYD also provides an assessment of the severity of the person's drinking problem.<br>|
| Experimental: Only normative feedback<br>Participant provided with just the normative feedback component of the CYD personalized feedback summary. | Behavioral: Check Your Drinking (CYD) personalized feedback intervention<br>* The CYD provides problem drinkers with a personalized summary of their drinking that compares his or her drinking with that of the general population. The CYD also provides an assessment of the severity of the person's drinking problem.<br>|
| Experimental: Just other personalized feedback<br>Participant provided with all the other personalized feedback components of the CYD intervention (i.e., no normative feedback). | Behavioral: Check Your Drinking (CYD) personalized feedback intervention<br>* The CYD provides problem drinkers with a personalized summary of their drinking that compares his or her drinking with that of the general population. The CYD also provides an assessment of the severity of the person's drinking problem.<br>|
| No Intervention: No intervention control<br>Participant provided with a list describing the components of the CYD intervention but not provided any personalized feedback. | |

What is the study measuring?
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Primary Outcome Measures

| Outcome Measure | Measure Description | Time Frame |
| --- | --- | --- |
| Drinks in a typical week | Number of drinks in a typical week | 3 months | 
| AUDIT-C score | Composite measure of three drinking items - frequency of drinking, drinks per drinking day, frequency of 5+ drinking days | 3 months | 
| Highest number of drinks on one occasion | Highest number of drinks on one occasion in the past 3 months | 3 months |