Table 3.
Overview of all measures and their measurement time points
| Assessment instruments | Base-line (t0) | 6 weeks (t1) | 3 months follow-up (t2) | 6 months follow-up (t3) | |
|---|---|---|---|---|---|
| 1 | Socio-demographics (age, gender, sexual orientation, educational attainment, migration background, financial situation) | X | |||
| 2 | Cannabis Use Disorders Identification Test (CUDIT-R) | X | X | X | X |
| 3 | Cannabis use | ||||
| 3a | Consumption Patterns (Years of Use, 30-day point prevalence of cannabis and CBD abstinence, Type of Consumption) | X | X | X | X |
| 3b | Defining the personal standard joint | X | |||
| 3c | TLFB (Cannabis use frequency and amount for the last 7 days in standard joint units) | X | X | X | X |
| 4 | Severity of Dependence Scale (SDS) | X | X | X | X |
| 5 | Short version of the Alcohol Use Disorders Identification Test (AUDIT-C) | X | X | X | |
| 6 | National Institute on Drug Abuse Screening (NIDA ASSIST) | X | X | X | |
| 7 | Drug Abuse Screening Test (DAST-10) | X | |||
| 8 | Perceived Stress Scale (PSS-10) | X | X | X | X |
| 9 | Patient Health Questionnaire for Depression (PHQ-9) | X | X | X | |
| 10 | Generalized Anxiety Disorder Screener (GAD-7) | X | X | X | |
| 11 | Adult ADHD Self-Report Scale (ASRS-V1.1) | X | |||
| 12 | Mindfulness Attention Awareness Scale (MAAS) | X | X | X | X |
| 13 | Comprehensive Inventory of Mindfulness Experiences (CHIME) | X | |||
| 14 | Previous experience in meditation (no official instrument) | X | |||
| 15 | Client Satisfaction Questionnaire for Internet Interventions (CSQ-I) | Xa | |||
| 16 | Negative effects, according to Rozental et al. (2015) | X | |||
| 17 | Use of any services besides CANreduce | X | X | ||
| 18 | Adherence and Retentionb | X |
a Only for study arms 1 and 2
b Adherence and retention are constructs measured indirectly and not part of a questionnaire