Preventing Impaired Driving Among Adolescents

Study Overview
=================
Brief Summary
-----------------
The primary goal of this project is to evaluate the efficacy of webCHAT, a single-session web-intervention, on reducing impaired driving among adolescents receiving behind-the-wheel training at driver education programs.

Detailed Description
-----------------
Alcohol and marijuana (AM) are the most commonly used substances among adolescents in the U.S. The consequences of AM use are significantly higher relative to use of either substance alone. This study builds on effective interventions that have demonstrated reductions in alcohol and/or marijuana use and reduced consequences one year later, and proposes to adapt one of those interventions, CHAT, to the web (web-CHAT). The investigators will evaluate the efficacy of web-CHAT among 15.5-17-year-old adolescents (n=150) recruited when teen participants are attending behind-the-wheel training. The study has the potential to promote public welfare by improving adolescent health outcomes and reducing risky driving behaviors that can have substantial monetary and social costs, as well as by providing unique insight into what mediates reduced risky driving attitudes behaviors among those in the intervention. The study is innovative because it is for both youth who are at risk for substance use as well as those who are not, and it is delivered during a teachable moment when adolescents receive driver's education. Finally, this study can provide unique insights about the efficacy of web-CHAT to reduce marijuana initiation, use, and risky driving attitudes in the context of a changing marijuana policy climate. A 3-year study is proposed to test the feasibility of research procedures in a driver education setting and pilot the efficacy of web-CHAT. The investigators will test whether web-CHAT reduces alcohol and/or marijuana initiation or use compared to teens in UC, at three and six-month follow-up.

Official Title
-----------------
A Pilot Trial to Prevent Intoxicated and Impaired Driving Among Adolescents

Conditions
-----------------
Substance-Related Disorders

Intervention / Treatment
-----------------
* Behavioral: webCHAT
* Behavioral: Usual Care


Participation Criteria
=================
Eligibility Criteria
-----------------
Inclusion Criteria: 15.5-17 year olds enrolled in driver education school Access to a computer or smartphone Within one month of taking their driver's licensing exam Exclusion Criteria: Under 15.5 or over 17 years old Not enrolled in one of the participating schools Non-English speaking

Ages Eligible for Study
-----------------
Minimum Age: 15 Years
Maximum Age: 17 Years

Sexes Eligible for Study
-----------------
All

Accepts Healthy Volunteers
-----------------
Accepts Healthy Volunteers

Study Plan
=================
How is the study designed?
-----------------

Design Details

Primary Purpose: Prevention
Allocation: Randomized
Intervention Model: Parallel Assignment
Interventional Model Description: Teen participants will be randomized to a single-session, self-guided web-intervention called webCHAT or usual care after completing an online baseline survey. Participants will complete follow-up surveys 3 and 6-months after baseline.
Masking: None (Open Label)


Arms and Interventions

| Participant Group/Arm | Intervention/Treatment |
| --- | --- |
| Experimental: webCHAT<br>Single session 20-40minute self-guided web program that discusses promotes healthy decision making around driving and discusses the risks of alcohol and cannabis-influenced driving. | Behavioral: webCHAT<br>* A self-guided, single session web intervention that utilizes a motivational interviewing style to prevent impaired driving<br>|
| Active Comparator: Usual Care<br>Existing driving school education | Behavioral: Usual Care<br>* 6 hours of driver education<br>|

What is the study measuring?
-----------------
Primary Outcome Measures

| Outcome Measure | Measure Description | Time Frame |
| --- | --- | --- |
| Alcohol and/or Cannabis use (scale from Monitoring the Future survey) | Number of days of alcohol, marijuana, and/or co-use (concurrent and simultaneous) in the past 30 days | Baseline through month 6 | 

Secondary Outcome Measures

| Outcome Measure | Measure Description | Time Frame |
| --- | --- | --- |
| Driving under the influence behaviors (scale from Monitoring the Future survey) | Number of times they drove a car, motorcycle or other vehicle after using marijuana, alcohol, and/or both in the past 30 days | Baseline through month 6 | 
| Passenger driving behavior behaviors (scale from Monitoring the Future survey) | Number of times they were a passenger in a car or other vehicle with a driver who had beenin the past 30 days drinking alcohol and/or using marijuana | Baseline through month 6 | 

 Terms related to the study
=================
Keywords Provided by Centre Hospitalier Valida
-----------------
impaired driving