Evaluation of an internet-based one-time counselling intervention for young cannabis- or alcohol-users

Evaluation of an internet-based one-time counselling intervention for young cannabis- or alcohol-users: an online randomised controlled trial

Status

Active, not recruiting

Phases

Unknown

Study type

Interventional

Source

ISRCTN

Registry ID

ISRCTN79857771

Enrollment

194

Registered

2010-11-25

Start date

2010-09-30

Completion date

Unknown

Last updated

2015-01-13

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

Conditions

Alcohol abuse or addicition, cannabis abuse or addicition Mental and Behavioural Disorders Addiction

Interventions

Participants in the experimental condition receive a one-time brief intervention delivered via internet-chat. During the intervention, Motivational Interviewing (MI) is applied by trained psychologist

Eligibility

Sex/Gender

All

Inclusion criteria

Inclusion criteria: The study aims at participants of two automated internet-based self-tests for cannabis- or alcohol-users installed on the prevention website www.drugcom.de. In order to be eligible for the study, those users have to meet the following criteria: 1. Problematic alcohol use defined as: 1.1. Alcohol Use Disorders Identification Test (AUDIT) score of 16 or more, or 1.2. Alcohol consumption of more than 60 g per day (men)/40 g per day (women), or 1.3. Binge drinking (i.e. at least 5 units of alcohol per occasion) at least once per week 2. Problematic cannabis use defined as 4 or more points in the Severity of Dependence Scale (SDS) (men) or 2 points or more (women) 3. Aged 18 - 35 years, either sex

Exclusion criteria

Exclusion criteria: Participants who currently receive professional help or participate at a self help group.

Design outcomes

Primary

Measure	Time frame
Alcohol users: 1. Mean weekly alcohol consumption: consumed amount of pure alcohol in the past 7 days 2. Mean number of consumption days in the past 30 days 3. Proportion of subjects not drinking hazardously: i.e., not drinking more than 24 grams of pure alcohol (men) or 12 grams (women) on any day during the last week Cannabis users: 4. Mean number of consumption days in the past 30 days Both alcohol and cannabis users: 5. Allocation on the Stages of Change (Transtheoretical Model) measured by the "Readiness to Change Questionnaire" (RTCQ) Measured using follow-up online surveys at one month and three months.	—

Measure

Time frame

Alcohol users: 1. Mean weekly alcohol consumption: consumed amount of pure alcohol in the past 7 days 2. Mean number of consumption days in the past 30 days 3. Proportion of subjects not drinking hazardously: i.e., not drinking more than 24 grams of pure alcohol (men) or 12 grams (women) on any day during the last week Cannabis users: 4. Mean number of consumption days in the past 30 days Both alcohol and cannabis users: 5. Allocation on the Stages of Change (Transtheoretical Model) measured by the "Readiness to Change Questionnaire" (RTCQ) Measured using follow-up online surveys at one month and three months.

—

Secondary

Measure	Time frame
Satisfaction with the received intervention, measured using follow-up online surveys at one month and three months.	—

Countries

Germany

Outcome results

None listed

Source: ISRCTN (via WHO ICTRP) · Data processed: Feb 4, 2026