Nicotine and cannabis use/misuse/abuse Mental and Behavioural Disorders Mental and behavioural disorders due to use of cannabinoids
Conditions
Interventions
Participants are randomly assigned to one out of the three following web-based, brief interventions:
1. Psycho-education (=control condition): mere knowledge transfer, provision of in
the information is thematically subdivided into smaller chapters
in order to read the next chapter participants have to click a ?next? button
2. Self-assessment with personalized, normative feedback: participants have to fill out two questionnaires
afterwards they receive feedbacks which are generated by an algorithm using the information given during the self-assessment
the feedbacks contain information about the frequency of use and scores (tobacco: dependence
cannabis: problematic use), including an explanation of the meaning of the scores (in relation to diagnostic cut-offs) as well as normative comparisons with reference populations of the same gender (o
finally, participants obtain a targeted advice to change their behaviour
3. Intervention based on principles of motivational interviewing: participants are asked mainly open-ended que
the goal is to promote the participants? self-reflective thinking about their smoking behaviour and intentions to change it, to strengthen the abstinent-related self-efficacy, and to make participants
participants receive periodically affirmative feedbacks and summaries of their input
Duration of the interventions: one session not longer than 20 minutes
Sponsors
Swiss Tobacco Prevention Fund (Switzerland)
Eligibility
Sex/Gender
All
Inclusion criteria
Inclusion criteria: 1. Tobacco use at least once during past 30 days 2. Cannabis use at least once during past 6 months 3. No age constraints, either gender
Exclusion criteria
Exclusion criteria: Does not meet inclusion criteria
Design outcomes
Primary
| Measure | Time frame |
|---|---|
| Motivation to quit tobacco and cannabis simultaneously after intervention (t1) measured at t0, t1, t2 with a readiness ruler ranging from 1 to 10 | — |
Secondary
| Measure | Time frame |
|---|---|
| 1. Motivation to quit tobacco (measured at t0, t1, t2 with a readiness ruler ranging from 1 to 10) 2. Motivation to quit cannabis (measured at t0, t1, t2 with a readiness ruler ranging from 1 to 10) 3. HAPA stages of change (measured at t0, t1, t2) 4. Tobacco mean amount of cigarettes per day during last 4 weeks (measured at t0 & t2) 5. Cannabis use frequency: mean use frequency (consumption units) per day (calculated from a 7 days timeline follow-back question) and consumption frequency during last 4 weeks (8 categories) measured at t0 & t2 6. Self efficacy (to abstain from tobacco and cannabis) measured at t0, t1, t2 7. General health status (single-item-measure from SF-36) measured at t0 & t2 8. Information seeking about integrative cessation course (t2; after the intervention, participants have to choose whether they want to obtain further information about the course ore whether they are not interested in the course) Enrolment for informative event of the integrative cessation course (measured with enrolment lists) 9. Participation in the integrative cessation course (measured with enrolment lists) 10. Tobacco cessation attempt during past 8 weeks measured at t2 11. Cannabis cessation attempt during past 8 weeks measured at t2 | — |
Countries
Switzerland
Outcome results
None listed