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.
Study Type
INTERVENTIONAL
Allocation
RANDOMIZED
Purpose
OTHER
Masking
NONE
Enrollment
374
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.
Canton Basel-Stadt
Basel, Canton of Basel-City, Switzerland
Change in problematic cannabis consumption behaviour
Cannabis Use Disorder Identification Test - Revised; min. value 0, max. value 32; higher scores mean worse outcome
Time frame: 6 / 12 /18 /24 / 30 months
Change in depression
Patient Health Questionnaire; min. value 0, max. value 27; higher scores mean worse outcome
Time frame: 6 / 12 /18 /24 / 30 months
Change in anxiety
Generalized Anxiety Disorder; min. value 0, max. value 21; higher scores mean worse outcome
Time frame: 6 / 12 /18 /24 / 30months
Change in psychosis
Checklist of early intervention; min. value 0, max. value 8; higher scores mean worse outcome
Time frame: 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
Time frame: 6 / 12 /18 /24 / 30 months
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