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Clinical Trials/NCT06422299
NCT06422299
Not Yet Recruiting
N/A

Developing and Testing an Online Intervention for Decreasing Alcohol and Cannabis Misuse and Increasing Healthy Relationship Skills Among Young Adult Couples: A Comprehensive Mixed-methods Approach

University of Washington0 sites60 target enrollmentJuly 15, 2026

Overview

Phase
N/A
Intervention
Not specified
Conditions
Alcohol Drinking
Sponsor
University of Washington
Enrollment
60
Primary Endpoint
Perceived Program Effects on Healthy Relationship Self-Efficacy items
Status
Not Yet Recruiting
Last Updated
last year

Overview

Brief Summary

The goal of this clinical trial is to develop and test a brief online intervention to reduce alcohol and cannabis misuse and improve healthy relationship skills among young adult couples. The main questions it aims to answer are:

  • Will the intervention be feasible and acceptable to young adult couples?
  • Will the intervention demonstrate initial efficacy in reducing risky substance use and increasing relationship functioning?

Eligible couples will complete a virtual baseline session and be randomized to intervention condition (online intervention with 3-5 weeks of self-paced modules) or control condition (no intervention). Couples will complete two follow-up surveys (post-assessment - approximately 5 weeks after baseline, 3-month). Couples in the control condition will be offered the intervention after 3-month follow-up.

Researchers will compare intervention and control groups to see if there there is a difference between the groups on substance misuse and relationship functioning at post-assessment and 3-month follow-up.

Registry
clinicaltrials.gov
Start Date
July 15, 2026
End Date
August 1, 2027
Last Updated
last year
Study Type
Interventional
Study Design
Parallel
Sex
All

Investigators

Responsible Party
Principal Investigator
Principal Investigator

Katherine Walukevich-Dienst

Acting Assistant Professor, School of Medicine

University of Washington

Eligibility Criteria

Inclusion Criteria

  • Both partners in the couple are 18-29 years old
  • In a committed romantic relationship (e.g., dating seriously, cohabiting, married) with each other for at least 3 months
  • Face-to-face contact their partner at least 5 days per week
  • Live in Washington State
  • Have a valid email address and access to a cell phone
  • Report alcohol and cannabis co-use at least three times in the past month
  • Willingness to: complete online surveys during the allotted time frames, receive text messages and emails from the project, complete a baseline session, and participate during the same time period as their partner

Exclusion Criteria

  • Couples who endorse any perpetration or receipt of severe interpersonal aggression during screening will be excluded and provided with resources

Outcomes

Primary Outcomes

Perceived Program Effects on Healthy Relationship Self-Efficacy items

Time Frame: Screening, baseline, approximately 5 weeks after baseline, 3-month followup

Healthy relationship self-efficacy - 3 items assessing perceived intervention impacts on healthy relationship self-efficacy scored 0=strongly disagree to 5=strongly agree. Scores will be summed, total scores will range from 0 to 15, with higher scores indicating greater healthy relationship self-efficacy

Couples Satisfaction Index

Time Frame: Screening, baseline, approximately 5 weeks after baseline, 3-month followup

Relationship satisfaction - sum of 4 items ranges from 0 to 21, higher scores indicate greater relationship satisfaction

Intensity of Marijuana Use

Time Frame: Screening, baseline, approximately 5 weeks after baseline, 3-month followup

Cannabis use intensity - Average number of times used cannabis per day will be calculated as the mean number of times participant reports using cannabis per each day of a typical week in the past month

Heavy episodic and high intensity drinking

Time Frame: Screening, baseline, approximately 5 weeks after baseline, 3-month followup

Alcohol use - number of days in the past month participant engaged in heavy episodic drinking (4+/5+ drinks in one occasion for women/men) and high intensity drinking (8+/10+ drinks in one occasion for women/men)

Daily Drinking Questionnaire (DDQ)

Time Frame: Screening, baseline, approximately 5 weeks after baseline, 3-month followup

Alcohol use - Average total drinks per week will be calculated as the sum of the total number of drinks reported.

Daily Marijuana Questionnaire (DMQ)

Time Frame: Screening, baseline, approximately 5 weeks after baseline, 3-month followup

Cannabis use - Average total hours high from cannabis per week will be calculated as the sum of the total hours high reported

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