A randomised controlled trial of a smartphone application for people wanting to reduce or quit their use of cannabis

Not Applicable

• Conditions: Cannabis use; Mental Health - Addiction

• Registration Number: ACTRN12616000622404
• Lead Sponsor: ational Cannabis Prevention and Information Centre, UNSW

Brief Summary

Not available

Detailed Description

Not available

Study Timeline

• Results First Posted: 1900-01-01
• Study Start: 2016-05-13
• Last Update Posted: 13 January 2020

Recruitment & Eligibility

• Status: ot yet recruiting
• Sex: All
• Target Recruitment: 525

Inclusion Criteria

To be eligible for inclusion in the study, participants will need to be at least 16 years old. They will also need to be English-literate due to the nature of the intervention and assessment methods. Participants will not need to meet the DSM-IV criteria for substance abuse or dependence; rather, they need to have expressed a desire to reduce cannabis use, and have used cannabis within the last month at least weekly.

Exclusion Criteria

Participants who have received formal treatment for cannabis use within the last three months, or who are currently in treatment for any other substance use problem will be excluded from the study.

Study & Design

• Study Type: Interventional
• Study Design: Not specified

Primary Outcome Measures

Name	Time	Method
Cannabis use frequency - Number of days in the past month (measured using the Brief Treatment Outcome Measure; BTOM)[At baseline, and 4 and 8 weeks following completion of baseline assessment];Cannabis use quantity - Number of joints/cones used typically per day in the past month (converted into standard cannabis units), as measured using the Brief Treatment Outcome Measure (BTOM)[At baseline, and 4 and 8 weeks following completion of baseline assessment];Weekly cannabis use (total standard cannabis units per week) - Past 3 months (measured using the Timeline Followback method; TLFB)[Eight weeks following completion of baseline assessment]

Secondary Outcome Measures

Name	Time	Method
Past month cannabis dependence (measured using the Severity of Dependence Scale; SDS)[At baseline, and 4 and 8 weeks following completion of baseline assessment];Self-efficacy for resisting the urge to use cannabis (measured using a 20-item self-efficacy scale adapted for cannabis use by Stephens et al, 1995)[At baseline, and 4 and 8 weeks following completion of baseline assessment];Motivation for change, measured using the Readiness to Change Questionnaire (RTCQ)[At baseline, and 4 and 8 weeks following completion of baseline assessment];Psychological distress, measured using the Kessler Psychological Distress Scale (K10)[At baseline, and 4 and 8 weeks following completion of baseline assessment]