Not provided
Not provided
Not provided
Not provided
Not provided
Not provided
Not provided
Not provided
Not provided
Not provided
Not provided
Not provided
Not provided
| Name | Class |
|---|---|
| University of Basel | OTHER |
| University Psychiatric Clinics Basel | NETWORK |
| Psychiatric Services Aargau AG | OTHER |
Not provided
Not provided
Not provided
Not provided
The randomised controlled study on regulated cannabis access in pharmacies in Basel aims to investigate the effects of regulated cannabis access on consumption behaviour and mental and physical health in comparison to the illegal market.
This project consist of two parts: The first part is a randomised controlled study, the second part is an observational study. The randomised controlled study will last six months. Participants will randomly be assigned to one of two groups: Group 1 has immediately access to regulated cannabis in pharmacies; Group 2 has to wait for six months. After six months all participants will have access to regulated cannabis in pharmacies (oberservational study). Every six month participants will be invited to answer online-questionnaires on their cannabis consumption behavior, their mental and physical health. The entire study lasts 2.5 years.
Not provided
Not provided
Not provided
Not provided
| Label | Type | Description | Intervention Names |
|---|---|---|---|
| Experimental group | Experimental | Immediately regulated cannabis access in pharmacies. |
|
| Control group | No Intervention | During the first six months participants of the control group have to continue to buy their cannabis on the illicit market. Afterthese six months they also have access to regulated cannabis access. |
| Name | Type | Description | Arm Group Labels | Other Names |
|---|---|---|---|---|
| Regulated cannabis access in pharmacies | Other | The study does not investigate the health effects of cannabis. The study investigates the effects of regulated cannabis access on cannabis consumption and health in comparison to the unregulated illegal market. |
| Measure | Description | Time Frame |
|---|---|---|
| Change in problematic cannabis consumption behaviour | Cannabis Use Disorder Identification Test - Revised; min. value 0, max. value 32; higher scores mean worse outcome | 6 / 12 /18 /24 / 30 months |
| Measure | Description | Time Frame |
|---|---|---|
| Change in depression | Patient Health Questionnaire; min. value 0, max. value 27; higher scores mean worse outcome | 6 / 12 /18 /24 / 30 months |
| Change in anxiety | Generalized Anxiety Disorder; min. value 0, max. value 21; higher scores mean worse outcome |
Not provided
Inclusion Criteria:
Exclusion Criteria:
Not provided
Not provided
Not provided
Not provided
Not provided
Not provided
Not provided
| Facility | Status | City | State | ZIP | Country | Contacts |
|---|---|---|---|---|---|---|
| Canton Basel-Stadt | Basel | Canton of Basel-City | Switzerland |
| PubMed Identifier | Type | Citation | Retractions |
|---|---|---|---|
| 37032954 | Derived | Baltes-Flueckiger L, Steinauer R, Meyer M, Vogel M, Walter M. Effects of cannabis regulation in Switzerland: Study protocol of a randomized controlled trial. Front Psychiatry. 2023 Mar 23;14:1139325. doi: 10.3389/fpsyt.2023.1139325. eCollection 2023. |
Not provided
Not provided
All IPD that underlie results in publications.
6 months after publication
Only research institutions will have access. Data dictionaries will be shared for studies that are planning to investigate similar research questions. Principal investigator or co-investigator will review the requests.
Not provided
Not provided
| ID | Term |
|---|---|
| D001523 | Mental Disorders |
Not provided
Not provided
Not provided
| ID | Term |
|---|---|
| D010594 | Pharmacies |
| ID | Term |
|---|---|
| D006268 | Health Facilities |
| D005159 | Health Care Facilities Workforce and Services |
Not provided
Not provided
Not provided
Not provided
Not provided
One group has immediately access to regulated cannabis access in pharmacies and the other group has to wait six months until they have regulated cannabis access.
Not provided
| 6 / 12 /18 /24 / 30months |
| Change in psychosis | Checklist of early intervention; min. value 0, max. value 8; higher scores mean worse outcome | 6 / 12 /18 /24 / 30 months |
| Change in physical health | Symptom Checklist - 90, Somatization; min. value 0, max. value 48; higher scores mean worse outcome | 6 / 12 /18 /24 / 30 months |