An interventional study of Online, couples-based intervention in Alcohol Drinking, Cannabis Use and Couples, sponsored by University of Washington. Not yet recruiting. Open to participants aged 18 Years to 29 Years, including healthy volunteers. Per ClinicalTrials.gov, last updated 2026-07-08.
Sponsored by University of Washington · Not applicable, Interventional, and Prevention
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:
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.
701 studies on the registry are indexed under Alcohol Drinking; 133 are open to participants now.
This study's planned enrollment of 60 is below the median of 122 across 607 interventional studies indexed under Alcohol Drinking.
Browse Alcohol Drinking studies →University of Washington is the lead sponsor of 1,433 studies on the registry; 225 are open to participants now.
Of its 158 completed or terminated interventional studies of FDA-regulated products, 136 (86%) have results posted.
Counted across the registry records on this site, refreshed daily.
Go through the criteria one by one — yes, no or not sure — and take the list to your doctor or the study team. Kept in this browser only.
Exclusion Criteria:
A novel, brief online intervention for young adults community couples who engage in alcohol and cannabis co-use.
Behavioral: Online, couples-based intervention
Couples in the control condition will not receive an intervention.
During Phase 1 of the present study, the intervention will be iteratively developed using a rigorous, user-centered design approach through integration of knowledge gained from Phase 1 dyadic analyses and qualitative interviews, and existing gold-standard treatments for substance use among couples, including Integrative Behavioral Couples Therapy (IBCT; Christensen \& Doss, 2016) and Behavioral Couples Therapy for Alcohol (ABCT; McCrady et al, 1995) and substance use brief interventions for young adults (Halladay, et al., 2019; Tanner-Smith et al., 2015).
Heavy episodic and high intensity drinking
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)
Time frame: Screening, baseline, approximately 5 weeks after baseline, 3-month followup
Daily Drinking Questionnaire (DDQ)
Alcohol use - Average total drinks per week will be calculated as the sum of the total number of drinks reported.
Time frame: Screening, baseline, approximately 5 weeks after baseline, 3-month followup
Daily Marijuana Questionnaire (DMQ)
Cannabis use - Average total hours high from cannabis per week will be calculated as the sum of the total hours high reported
Time frame: Screening, baseline, approximately 5 weeks after baseline, 3-month followup
Intensity of Marijuana Use
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
Time frame: Screening, baseline, approximately 5 weeks after baseline, 3-month followup
Perceived Program Effects on Healthy Relationship Self-Efficacy items
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
Time frame: Screening, baseline, approximately 5 weeks after baseline, 3-month followup
Couples Satisfaction Index
Relationship satisfaction - sum of 4 items ranges from 0 to 21, higher scores indicate greater relationship satisfaction
Time frame: Screening, baseline, approximately 5 weeks after baseline, 3-month followup
No study locations are listed for this record.
Start is estimated for Oct 2026; primary completion for Oct 2027, 12 months later.
Of 328 non-industry interventional studies with no phase under Alcohol Drinking, half reached primary completion within 24 months of starting (the median), counting those still running; a quarter within 11 and three quarters within 45. This study's planned 12 months is below that.
Counting every sponsor, half of 336 studies reached it within 24 months; a quarter within 10 and three quarters within 45.
How these figures are worked out, and which studies are left out of them.
This study is not yet recruiting, as verified in Jul 2026. You cannot join it, but the record below documents what was studied.
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