Daily use of cannabis related to increased risk of psychology

Publicado em 23 março 2019

According to case-control studies in Lancet psychiatry, daily use of cannabis is associated with significant risks of mental development.

Some 900 adults The first episodes of Psychosis were performed with 1200 controls in 11 sites in Europe and Brazil.

Participants completed a questionnaire about lifespan cannabis use; In analysis, the registered concentration of tetrahedrokanabinol (THC) in cannabis was also considered in many countries.

Generally, the use of daily cannabis was associated with three times more likely mentality than occasional or occasional use. Daily use of high power cannabis (THC 10% or more) was associated with an increase of about fivefold in risk.

Researchers wrote: "For the sake of reasoning, the total number of cases of mental disorder in the total sample, thanks to daily use, was 20.4%." A commentator does not support these reasons, he notes: "It is quite possible that the connection between cannabis and mentality is bipartisan, which other studies suggest that uses genetic variables."



The use of cannabis joins the risk of subsequent psychological disorders, but it is not yet clear whether it affects the incidence of disorder.

Ours The target Identify the pattern of cannabis use with the biggest impact on the potential of mental disorders across Europe and discover whether the difference in such patterns contributes to variation in the rate of mental disorder.


We included patients from 18 to 64 years old Psychological services in 11 sites in Europe and Brazil First Episode Psychosity and Recruitment Controls With Representatives of Local Population

We have used adjusted logistic regression models to estimate that cannabis use patterns have the highest probability of mental disorder.

By using national and European data on the expected concentration of ?9-tetrahedrokanabinol (THC) in different types of cannabis available on the sites, we divided the types of cannabis used by the participants in two categories: low power (THC São Paulo Research Foundation, National Institute for Health Research (NIHR), Biomedical Research Center (BRC) in South London and Muddusley NHS Foundation Trust and at King College London and University College London, Welcome Trust NIHR BRC