Aims: To characterize the pattern of cannabis and tobacco use and withdrawal symptoms in people who start treatment for cannabis use disorders (exclusive cannabis, concurrent and/or simultaneous with various tobacco products) through an aplication game and considering the type of users. Methodology: Mixed-methods research composed of three studies. Study I: qualitative participatory action study aimed at exploring the experiences and preferences of the cannabis users on the use of apps. This information will be instrumental in the co-design of the app. Study II: prospective longitudinal study aimed to establish consumption patterns and transitions between substances and to validate the scale of cannabis withdrawal symptoms in the Spanish population. Sample size: expected RR=1.20, α =0.05, β= 0.20, losses= 20% (n=282). Study III: qualitative study to explore participants' experiences during the process of quitting cannabis and / or tobacco. Expected results: Characterization and prediction of variables that influence cannabis and tobacco cessation/ reduction and describe withdrawal symptoms according to consumption patterns with aim of improving the design of future interventions.
Study Type
OBSERVATIONAL
Enrollment
282
Cannabis use
Number of participants that use several cannabis products (hashish, marijuana, etc.)
Time frame: Change between baseline and 6 weeks follow-up
Tobacco use
Number of participants that use several type of tobacco product/s
Time frame: Change between baseline and 6 weeks follow-up
Abstinence from cannabis
If a participant reduces or quits their cannabis use, we will ask for their presence of 16 withdrawal symptoms. Each symptom is scored from 0 (minimum) to 3 (maximum). Higher scores mean a worse outcome.
Time frame: Change between baseline and 6 weeks follow-up
Abstinence from tobacco
If a participant reduces or quits their tobacco use, we will ask for their presence of 6 withdrawal symptoms using the Fagerström test. The test has a minimum score of 0 and a maximum of 10. Higher scores mean a worse outcome.
Time frame: Change between baseline and 6 weeks follow-up
Motivation to quit
Using a Likert scale randing from 0 to 10 (0=totally unmotivated and 10= totally motivated)
Time frame: Baseline
Psychological assessment
States of change or readiness to quit cannabis and tobacco according to Prochaska and Di Clemente's model (pre-contemplative, contemplative, prepared, action and maintenance.
Time frame: Baseline
Self-perceived health status
Will be assessed based on "How would you say your general health is?" (excellent, very good, good, fair, very fair, poor)
Time frame: Baseline
Social and cultural factors
Questions related to their social circle/network (friends and colleagues) and social climate overall
Time frame: Baseline
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