Effects of intervention duration and chat-based intervention in an online cannabis treatment program

Effects of intervention duration and chat-based intervention in an online cannabis treatment program ("Quit the Shit") - an online randomised controlled trial

Status

Active, not recruiting

Phases

Unknown

Study type

Interventional

Source

ISRCTN

Registry ID

ISRCTN99818059

Enrollment

552

Registered

2014-06-27

Start date

2014-08-18

Completion date

Unknown

Last updated

2020-01-21

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

Conditions

Cannabis use disorder Mental and Behavioural Disorders Drug addiction

Interventions

Study participants are randomized to one of four groups 1. 28 days duration without therapist-guided chat 2. 50 days duration without therapist-guided chat

Eligibility

Sex/Gender

All

Inclusion criteria

Inclusion criteria: 1. Minimum age 18 years 2. Currently no alcohol use disorder (score of less than 3 in the CAGE instrument), psychotic disorder or bipolar disorder 3. Currently no use of other illicit drugs on more than 4 days during the last 30 days 4. No previous participation at the program 5. No suicidal thoughts

Exclusion criteria

Exclusion criteria: Does not meet inclusion criteria

Design outcomes

Primary

Measure	Time frame
1. Cannabis use days during the last 30 days 2. Cannabis use amount (grams) during the last 30 days	—

Secondary

Measure	Time frame
1. Severity of Dependence Scale SDS 2. Cannabis Craving Scale CCS-7	—

Countries

Germany

Outcome results

None listed

Source: ISRCTN (via WHO ICTRP) · Data processed: Mar 2, 2026