Evaluation of an Interactive Mobile Phone-Based Brief Intervention to Reduce Substance-Impaired Driving

Enrolling by invitation · Not applicable

Conditions studied: Driving Impaired

In brief

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.

Key facts

Study ID

NCT05537116

Run by

Western Kentucky University

People needed

240

Starts

2022-10-18

Expected to finish

2026-03-31

Last updated by the study team

2025-08-13

Who can join

Age: 18 and older, up to 29. Sex: any. Healthy volunteers: accepted.

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

Where it is running

• Kelly Thompson Hall — Bowling Green, Kentucky, United States

Full record on ClinicalTrials.gov

Trial information comes from ClinicalTrials.gov and is refreshed daily. TrialsForMe does not provide medical care and does not run the studies it lists.