The purpose of this study is to identify and evaluate oral fluid testing as a biologic measure of cannabis use days that can be assessed remotely. The researchers will conduct this fully virtual study among a community sample of 200 individuals aged 18-30 years who have used cannabis at least 1 time per week on average in the past 30 days. Participants will complete oral fluid (saliva) tests, urine tests, and Timeline Follow-back interviews (self-report) that indicate their recent cannabis use (delta-9-THC). Participants will present for 3 virtual study visits across \~3-4 weeks and be asked to complete activities in between: Study Visit 1 (Day 0; informed consent, baseline survey, TLFB interview), Study Visit 2 (\~Day 7; TLFB interview, urine testing), 6 days of at-home videorecorded oral fluid testing, Study Visit 3 (\~Day 21; TLFB interview, urine test, oral fluid test, survey, interview).
Age range
18 Years – 30 Years
Sex
ALL
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Bring these to your next appointment. They're a starting point for a shared conversation — not a sign you qualify or a recommendation to enrol.
Generated to help you prepare — always confirm anything about your own eligibility and care with the study team and your doctor.
The trial coordinator is the person who runs the study day to day. These cover the practical side — logistics, costs, and what taking part would actually mean for your life. The study team confirms whether you meet the criteria; these are questions to ask, not a sign you qualify.
A starting point for the conversation — always confirm anything about your own eligibility, costs, and care with the study team and your doctor.
Testing duration: self-testing
Timeframe: Across 6 days leading up to the Day-21 visit
Testing duration: observed test
Timeframe: Day of/During the Day-21 visit
Oral fluid testing protocol adherence: self-testing completed
Timeframe: Across 6 days leading up to the Day-21 visit
Oral fluid testing protocol adherence: observed test completed
Timeframe: Day of/During the Day-21 visit
Oral fluid testing protocol adherence: testing steps performed
Timeframe: Across 6 days leading up to the Day-21 visit; Day of/During the Day-21 visit
Oral fluid testing protocol adherence: testing steps performed correctly
Timeframe: Across 6 days leading up to the Day-21 visit; Day of/During the Day-21 visit
Unreadable test results
Timeframe: Across 6 days leading up to the Day-21 visit; Day of/During the Day-21 visit
Inconclusive test results
Timeframe: Across 6 days leading up to the Day-21 visit; Day of/During the Day-21 visit
Oral fluid test results
Timeframe: Across 6 days leading up to the Day-21 visit; Day of/During the Day-21 visit
Oral fluid acceptability
Timeframe: Day-21 visit
Use/Non-use intervals of 4 days
Timeframe: Across 6 days leading up to the Day-21 visit; Day of/During the Day-21 visit
Use/Non-use
Timeframe: Day-21 visit