The iSTART intervention is a 30-day substance prevention web-app whereby students complete five weekly interactive modules using a smart device or computer. Each module is approximately 15 minutes long, and focuses on a select substance: (i) alcohol, (ii) marijuana, (iii) nicotine, (iv) prescription drugs, and (v) illicit drugs. The modules are based on key theoretical constructs, behavior change strategies, and practical module components: attitudes (knowledge), perceived susceptibility (risk perceptions), subjective norms (normative re-education), and self-efficacy (refusal skills). This intervention will be evaluated via a time series design using a sample of 600 students randomly assigned to either the intervention, comparison, or control condition at a public institution in southern California.
Age range
18 Years – 30 Years
Sex
ALL
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AI-rewrites the medical criteria so a patient or caregiver can understand them. Always confirm with the trial site.
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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.
Change from baseline alcohol use behavior at 3 months.
Timeframe: Baseline and 90-days following intervention completion.
Change from baseline binge drinking at 3 months.
Timeframe: Baseline and 90-days following intervention completion.
Change from baseline tobacco use at 3 months.
Timeframe: Baseline and 90-days following intervention completion.
Change from baseline electronic vaping at 3 months.
Timeframe: Baseline and 90-days following intervention completion.
Change from baseline marijuana use at 3 months.
Timeframe: Baseline and 90-days following intervention completion.
Change from baseline non-prescribed prescription drug use at 3 months.
Timeframe: Baseline and 90-days following intervention completion.
Change from baseline illicit drug use at 3 months.
Timeframe: Baseline and 90-days following intervention completion.