Summative Evaluation of a Cannabis Prevention Program for Students

Summative Evaluation of a Cannabis Prevention Program for Students - ReStudy

Status

Recruiting

Phases

Unknown

Study type

Interventional

Source

DRKS

Registry ID

DRKS00037884

Enrollment

840

Registered

2025-09-11

Start date

2025-10-15

Completion date

Unknown

Last updated

2026-08-03

For informational purposes only — not medical advice. Sourced from public registries and may not reflect the latest updates. Terms

Conditions

F12.1 F10.1 F17.1 F19.1 Z72 Z73

Interventions

Group 1: Intervention Group (Participation in the 12-module ReStudy Seminar) - Participant Cohort: Adult students enrolled at German universities. - Measurement Points: t0 (Pre-measurement: Semester

additional: Session evaluations (short online questionnaires) after each seminar session. - Description of Intervention: Participants attend a 12-week ReStudy prevention seminar, offered as part of th

instead, they are subsequently interviewed using a guideline-based approach regarding the program's implementation, to gain insights for optimizing its delivery. Group 2: Control Group (Comparison Sem

Eligibility

Sex/Gender

All

Age

18 Years to No maximum

Inclusion criteria

Inclusion criteria: Students enrolled at German universities Sufficient German language skills to understand program content, study information, consent form, and questionnaires

Exclusion criteria

Exclusion criteria: Individuals who do not meet the above-mentioned inclusion criteria.

Design outcomes

Primary

Measure	Time frame
Measurement Points: Online survey within the seminar (Pre: t0 semester start, Post: t1 semester end), as well as t2 (6-month Follow-up). Measurement Instruments: - Substance-related Risk Competence of Students (RIKO-Stud; Nagy, 2014) - Psychoactive substance use: Medication Use, Alcohol, Smoking & Substance Involvement Screening Test (WHO-ASSIST; Schütz et al., 2005), Alcohol Use Disorders Identification Test-Concise (AUDIT-C; Bush, 1998), CRAFFT-d (Tossmann et al., 2011), The Fagerstrom Test for Nicotine Dependence (FTND; Fagerstrom & Schneider, 1989), Heidelberg Drug Questionnaire (HDB, Cannabis Module; Aguilar-Raab et al., 2011), The Cannabis Use Disorders Identification Test-Revised (CUDIT-R; Adamson et al., 2010) - Psychological burden (stress, exhaustion): Perceived Stress Scale 4 (PSS-4; Cohen et al., 1983; Vallejo et al., 2018), Heidelberg Stress Scale (HEI-STRESS; Schmidt & Obergfell, 2011; Sieverding et al., 2013), Short form of the Maslach Burnout Inventory – Student Survey (MBI-SS-KF; Wörfel et al., 2015)	—

Measure

Time frame

Measurement Points: Online survey within the seminar (Pre: t0 semester start, Post: t1 semester end), as well as t2 (6-month Follow-up). Measurement Instruments: - Substance-related Risk Competence of Students (RIKO-Stud; Nagy, 2014) - Psychoactive substance use: Medication Use, Alcohol, Smoking & Substance Involvement Screening Test (WHO-ASSIST; Schütz et al., 2005), Alcohol Use Disorders Identification Test-Concise (AUDIT-C; Bush, 1998), CRAFFT-d (Tossmann et al., 2011), The Fagerstrom Test for Nicotine Dependence (FTND; Fagerstrom & Schneider, 1989), Heidelberg Drug Questionnaire (HDB, Cannabis Module; Aguilar-Raab et al., 2011), The Cannabis Use Disorders Identification Test-Revised (CUDIT-R; Adamson et al., 2010) - Psychological burden (stress, exhaustion): Perceived Stress Scale 4 (PSS-4; Cohen et al., 1983; Vallejo et al., 2018), Heidelberg Stress Scale (HEI-STRESS; Schmidt & Obergfell, 2011; Sieverding et al., 2013), Short form of the Maslach Burnout Inventory – Student Survey (MBI-SS-KF; Wörfel et al., 2015)

—

Secondary

Measure	Time frame
- Resilience: Brief Resilience Scale (BRS; Chmitorz et al., 2018; Kunzler et al., 2018) - Self-efficacy: General Self-Efficacy Short Scale (ASKU; Beierlein et al., 2014) - Psychosocial life skills: Procrastination Questionnaire for Students (PFS-4; Glöckner-Rist et al., 2009), Behavioral, Emotional, and Social Skills Inventory (BESSI-G-20; Lechner et al., 2022; Sewell et al., 2024) - Problematic media use: Social Media Disorder Test (SMDT; Wartberg et al., 2023), Gaming Disorder Test (GDT; Montag et al., 2019; Pontes et al., 2021)	—

Measure

Time frame

- Resilience: Brief Resilience Scale (BRS; Chmitorz et al., 2018; Kunzler et al., 2018) - Self-efficacy: General Self-Efficacy Short Scale (ASKU; Beierlein et al., 2014) - Psychosocial life skills: Procrastination Questionnaire for Students (PFS-4; Glöckner-Rist et al., 2009), Behavioral, Emotional, and Social Skills Inventory (BESSI-G-20; Lechner et al., 2022; Sewell et al., 2024) - Problematic media use: Social Media Disorder Test (SMDT; Wartberg et al., 2023), Gaming Disorder Test (GDT; Montag et al., 2019; Pontes et al., 2021)

—

Countries

Germany

Contacts

Public ContactSamuel Tomczyk

Universität Greifswald

samuel.tomczyk@uni-greifswald.de+493834 420 3806

Outcome results

None listed

Source: DRKS (via WHO ICTRP) · Data processed: Aug 10, 2026