Internet-Based Treatment for Individuals With Regular Cannabis Use: A Randomized Controlled Trial

NCT02408640 | Completed

• 1 other identifier: 2014/1374-31/5-1
• Study Type: interventional
• Target: 303
• Locations: 1 country
• Sites: 1

Brief Summary

The aim of this randomized controlled trial is to investigate the effects of a Swedish Internet-based treatment program for individuals from the general population with a regular cannabis use. The primary hypothesis to be tested is that the use of the Internet-based treatment program will be associated with more cannabis-free days in comparison to only access to information about cannabis use and its harmful effects. The secondary hypotheses to be tested are:

1. 1.That the use of the Internet-based treatment program will be associated with a larger decline in cannabis consumption (frequency and quantity) among individuals with regular cannabis use in comparison to only access to information about Cannabis use and its harmful effects.
2. 2.That the use of the Internet-based treatment program will be associated with a larger decline in alcohol consumption, depression and anxiety and increased sense of coherence in comparison to only access to information about Cannabis use and its harmful effects.
3. 3.That the proportion of individuals who seek professional help or talk to their relatives or friends about reducing or stopping cannabis use will be greater among those who use the Internet-based treatment program than among those who only have access to information about cannabis use and its harmful effects.

Conditions

Cannabis

Keywords

Internet-Based; Treatment

Outcome Measures

Primary Outcomes (1)

• Number of days without cannabis use.

  Past seven days

Secondary Outcomes (10)

• Grams of cannabis consumed.

  Past three months

• Reduction in frequency of cannabis use.

  Past three months

• Number of DSM-V criteria for cannabis dependence.

  Past three months

• Total score on Cannabis Abuse Screening Test (CAST).

  Past three months

• Receiving professional help for cannabis use from relatives or friends.

  Past three months

Study Arms (2)

Intervention group

EXPERIMENTAL

Individuals randomized to the intervention group will directly after randomization answer questions about alcohol and drug use (other than alcohol and cannabis), depression, anxiety, a sense of context and whether they during the last 12 months has received professional help to reduce or quit their cannabis use or during the same period have raised this issue with their relatives or friends. Further, they will fill out a survey about Internet-based services for individuals who wish to reduce or quit their cannabis use. The study participants will then be informed that they, within two days, will gain access to an internet based treatment program designed to help them quit their cannabis use and that they through the program will be able to communicate with a therapist. Within the next two days, they will gain access to the internet-based treatment program, they will have access to it for two months and they will be contacted again after three months to complete the follow-up.

Behavioral: Cannabishjalpen.se

Control group

NO INTERVENTION

Individuals randomized to the control group will undergo exactly the same procedure as the intervention group. The difference is that the control group will be informed that they in about three months will gain access to an internet based treatment program designed to help them quit their cannabis use (i.e. when the data collection for follow-up is completed). Otherwise, participants in both groups will have the opportunity to use factual information that is available to everyone on Cannabishjalpen.se.

Interventions

Cannabishjalpen.se BEHAVIORAL

Intervention group

Eligibility Criteria

• Age: 16 Years+
• Sex: all
• Healthy Volunteers: No
• Age Groups: Child (0-17), Adult (18-64), Older Adult (65+)

You may qualify if:

• Age \>15
• Cannabis use 1 time/week or more often during the past six months.

Sponsors & Collaborators

• Karolinska Institutet: lead

Study Sites (1)

Center for Psychiatric Research

Stockholm, 113 64, Sweden

Location

Related Publications (1)

• Sinadinovic K, Johansson M, Johansson AS, Lundqvist T, Lindner P, Hermansson U. Guided web-based treatment program for reducing cannabis use: a randomized controlled trial. Addict Sci Clin Pract. 2020 Feb 18;15(1):9. doi: 10.1186/s13722-020-00185-8.

  PMID: 32070417 DERIVED

MeSH Terms

Conditions

Marijuana Abuse

Condition Hierarchy (Ancestors)

Substance-Related Disorders; Chemically-Induced Disorders; Mental Disorders

Study Officials

• Kristina Sinadinovic, PhD

  Karolinska Institutet, Department of Clinical Neuroscience, Center for Psychiatric Research and Education

  PRINCIPAL INVESTIGATOR

Study Design

• Study Type: interventional
• Phase: not applicable
• Allocation: RANDOMIZED
• Masking: SINGLE
• Who Masked: PARTICIPANT
• Purpose: TREATMENT
• Intervention Model: PARALLEL
• Sponsor Type: OTHER
• Responsible Party: PRINCIPAL INVESTIGATOR
• PI Title: PhD

Study Record Dates

• First Submitted: March 26, 2015
• First Posted: April 3, 2015
• Study Start: June 26, 2015
• Primary Completion: December 31, 2017
• Study Completion: December 31, 2017
• Last Updated: July 29, 2019

Record last verified: 2019-07

Locations

SE (1)