Evidence-based therapist guided introduction to online heavy cannabis use treatment in Canadian adults: a Randomized Controlled Trial (RCT)

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This randomized controlled trial evaluates a therapist-guided Motivational Enhancement Therapy introduction to the online CANreduce program for Canadian adults with heavy cannabis use. The study compares this intervention against non-MET research assistant introductions and psychoeducational controls across 152 participants over six weeks. Results indicate that all groups reduced cannabis consumption frequency and related problems, with the MET-therapist group showing significantly greater reductions in quantity used compared to the control.

ID
2c9c7cadc49646b4
Source org
PubMed Central
Author
Karli K. Rysen (Manitoba Health), Julian M. Carusone (York University), Jeffrey D. Wardell (Centre for Addiction and Mental Health), Matthias Schaub (University of Zurich), A. Wenger (University of Zurich), Harold R. Wallbridge (University of Manitoba), Jason D. Edgerton (University of Manitoba), Richard S. Kruk (University of Manitoba), Corey S. Mackenzie (University of Manitoba), Matthew T. Keough (York University)
Published
2026-01-17
OA status
gold
DOI
10.1186/s42238-025-00378-5
PMID
Not recorded
PMCID
Not recorded
Citations
1

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BibTeX

@article{allodium:2c9c7cadc49646b4,
  title = {Evidence-based therapist guided introduction to online heavy cannabis use treatment in Canadian adults: a Randomized Controlled Trial (RCT)},
  author = {Karli K. Rysen and Julian M. Carusone and Jeffrey D. Wardell and Matthias Schaub and A. Wenger and Harold R. Wallbridge and Jason D. Edgerton and Richard S. Kruk and Corey S. Mackenzie and Matthew T. Keough},
  year = {2026},
  journal = {PubMed Central},
  doi = {10.1186/s42238-025-00378-5},
  url = {https://doi.org/10.1186/s42238-025-00378-5}
}

RIS

TY  - JOUR
TI  - Evidence-based therapist guided introduction to online heavy cannabis use treatment in Canadian adults: a Randomized Controlled Trial (RCT)
AU  - Rysen, Karli K.
AU  - Carusone, Julian M.
AU  - Wardell, Jeffrey D.
AU  - Schaub, Matthias
AU  - Wenger, A.
AU  - Wallbridge, Harold R.
AU  - Edgerton, Jason D.
AU  - Kruk, Richard S.
AU  - Mackenzie, Corey S.
AU  - Keough, Matthew T.
PY  - 2026
PB  - PubMed Central
DO  - 10.1186/s42238-025-00378-5
UR  - https://doi.org/10.1186/s42238-025-00378-5
ER  -

APA

Rysen, K. K., Carusone, J. M., Wardell, J. D., Schaub, M., Wenger, A., Wallbridge, H. R., Edgerton, J. D., Kruk, R. S., Mackenzie, C. S., & Keough, M. T. (2026). Evidence-based therapist guided introduction to online heavy cannabis use treatment in Canadian adults: a Randomized Controlled Trial (RCT). PubMed Central. https://doi.org/10.1186/s42238-025-00378-5

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