Evaluation of an Interactive Mobile Phone-Based Brief Intervention to Reduce Substance-Impaired Driving
1 other identifier
interventional
240
1 country
1
Brief Summary
Substance-Impaired Driving among emerging adults remains a significant public health concern and may be the single riskiest substance-related outcome among young adults. Brief Interventions (BIs) have been shown to reduce alcohol-impaired driving among this age group, but are not often implemented - despite their demonstrated efficacy - because it is not economically feasible to deliver in-person BIs to all emerging adult substance users. The present study will be the first to examine whether a text-messaging-based cannabis-impaired driving BI significantly decreases cannabis-impaired driving among emerging adult cannabis users compared to an informational control. Participants will be 240 emerging adults who endorse driving after cannabis use (or combined alcohol and cannabis use) at least three times in the past 3 months. After completing baseline measures, participants will be randomly assigned to receive either: a) substance use information, b) a substance-impaired driving personalized feedback intervention, or c) a substance-impaired driving personalized feedback intervention plus interactive text messages. Participants will complete outcome measures 3 and 6 months post-intervention. Repeated measures mixed modeling analyses will be used to determine whether the intervention significantly reduces substance-impaired driving over time. The project has two specific aims: 1) to evaluate a text based cannabis-impaired driving intervention in a randomized clinical trial, and 2) to determine whether the use of interactive text-messages sustains intervention effects over time.
Trial Health
Trial Health Score
Automated assessment based on enrollment pace, timeline, and geographic reach
participants targeted
Target at P75+ for not_applicable
Started Oct 2022
Longer than P75 for not_applicable
1 active site
Health score is calculated from publicly available data and should be used for screening purposes only.
Trial Relationships
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Study Timeline
Key milestones and dates
First Submitted
Initial submission to the registry
September 8, 2022
CompletedFirst Posted
Study publicly available on registry
September 13, 2022
CompletedStudy Start
First participant enrolled
October 18, 2022
CompletedPrimary Completion
Last participant's last visit for primary outcome
March 31, 2026
CompletedStudy Completion
Last participant's last visit for all outcomes
March 31, 2026
CompletedAugust 13, 2025
August 1, 2025
3.5 years
September 8, 2022
August 7, 2025
Conditions
Outcome Measures
Primary Outcomes (1)
Driving after cannabis use
Number of times driving after cannabis use in the past 3 months
3 and 6 months post-intervention
Secondary Outcomes (1)
Driving after combined alcohol and cannabis use
3 and 6 months post-intervention
Other Outcomes (4)
Peer norms
3 and 6 months post-intervention
Perceived dangerousness
3 and 6 months post-intervention
Perceived consequences
3 and 6 months post-intervention
- +1 more other outcomes
Study Arms (3)
Personalized Feedback
EXPERIMENTALFollowing the baseline assessment, participants will be sent a link via text message to a secure website containing substance-impaired driving specific personalized feedback. Feedback will include the following elements: a personalized substance use profile and substance-impaired driving profile, information on social norms related to substance use and substance-impaired driving, personalized information on BAC (or level of impairment due to drug use) prior to driving, costs associated with a DUI citation in Kentucky, and information on combined drug and alcohol impaired driving risk (if endorsed).
Personalized feedback and text messages
EXPERIMENTALFollowing the baseline assessment, participants will be sent a link via text message to a secure website containing substance-impaired driving specific personalized feedback (described above). Participants will be asked to send a text message back to the study administrator after viewing the feedback document. After confirming receipt and processing of the document, the study administrator will then send the participant three text messages containing open-ended questions.
Information only
ACTIVE COMPARATORStudents randomized to the information condition will receive standard information about alcohol and other drugs and substance-impaired driving via a link to a website delivered through text message.
Interventions
Following the baseline assessment, participants will be sent a link via text message to a secure website containing substance-impaired driving specific personalized feedback. Feedback will include the following elements: a personalized substance use profile and substance-impaired driving profile, information on social norms related to substance use and substance-impaired driving, personalized information on BAC (or level of impairment due to drug use) prior to driving, costs associated with a DUI citation in Kentucky, and information on combined drug and alcohol impaired driving risk (if endorsed).
Following the baseline assessment, participants will be sent a link via text message to a secure website containing substance-impaired driving specific personalized feedback (described above). Participants will be asked to send a text message back to the study administrator after viewing the feedback document. After confirming receipt and processing of the document, the study administrator will then send the participant three text messages containing open-ended questions.
Students randomized to the information condition will receive standard information about alcohol and other drugs and substance-impaired driving via a link to a website delivered through text message.
Eligibility Criteria
You may qualify if:
- Age 18 or older
- Ability to speak, read, and write in English
- Reports driving after using cannabis prior to driving at least three times in the past three months
- Reports having access to a motor vehicle, a valid driver's license, and plans to drive a vehicle in the next 6 months
- Reports access to a cell phone and willingness to read intervention material and exchange 3 texts post intervention with the study administrator
- Reports a valid email address
You may not qualify if:
- Currently in treatment for substance use
Contact the study team to confirm eligibility.
Sponsors & Collaborators
Study Sites (1)
Kelly Thompson Hall
Bowling Green, Kentucky, 42101, United States
Study Officials
- PRINCIPAL INVESTIGATOR
Jenni Teeters, PhD
Western Kentucky University
Study Design
- Study Type
- interventional
- Phase
- not applicable
- Allocation
- RANDOMIZED
- Masking
- NONE
- Purpose
- TREATMENT
- Intervention Model
- PARALLEL
- Sponsor Type
- OTHER
- Responsible Party
- SPONSOR
Study Record Dates
First Submitted
September 8, 2022
First Posted
September 13, 2022
Study Start
October 18, 2022
Primary Completion
March 31, 2026
Study Completion
March 31, 2026
Last Updated
August 13, 2025
Record last verified: 2025-08
Data Sharing
- IPD Sharing
- Will share
- Shared Documents
- STUDY PROTOCOL, SAP, ICF
- Time Frame
- After all data is collected, a manuscript detailing findings from the study will be submitted for peer-review and de-identified data will be submitted to the NIDA data archive.
The final dataset will consist of self-reported data from survey questionnaires and qualitative data from text-messaging sessions. Preliminary data will be shared via a presentation at a national conference in the second and third years of the project. After all data is collected, a manuscript detailing findings from the study will be submitted for peer-review and de-identified data will be submitted to the NIDA data archive.