Observational studyInternational journal of methods in psychiatric research2020
Psychotic disorders hospitalizations associated with cannabis abuse or dependence: A nationwide big data analysis.
Observational study in International journal of methods in psychiatric research, 2020. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 16 papers.
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Who cites it
16 citing papers in PubMed.
- Avatar Intervention in Virtual Reality for Cannabis Use Disorder in Individuals With Severe Mental Disorders: Results From a 1-Year, Single-Arm Clinical Trial.JMIR mental health · 2024Trial
- The rising tide of drug-induced psychosis.Neuropsychiatrie : Klinik, Diagnostik, Therapie und Rehabilitation : Organ der Gesellschaft Osterreichischer Nervenarzte und Psychiater · 2026Review
- Age-Related Effects of Cannabis and Cannabinoids on Brain and Behavior.Cannabis and cannabinoid research · 2026Review
- Changes in psychosis-related emergency department and hospitalization rates among youth following cannabis legalization in Colorado.Drug and alcohol dependence · 2025Article
- Methylomic signature of current cannabis use in two first-episode psychosis cohorts.Molecular psychiatry · 2025Article
- Genetic contribution to disease-course severity and progression in the SUPER-Finland study, a cohort of 10,403 individuals with psychotic disorders.Molecular psychiatry · 2024Article
- Acute Toxicity and Pharmacokinetic Profile of an EU-GMP-CertifiedPharmaceuticals (Basel, Switzerland) · 2023Article
- Avatar Intervention for Cannabis Use Disorder in Individuals with Severe Mental Disorders: A Pilot Study.Journal of personalized medicine · 2023Article
- State Cannabis Legalization and Psychosis-Related Health Care Utilization.JAMA network open · 2023Article
- Impact of cannabis legalization on healthcare utilization for psychosis and schizophrenia in Colorado.The International journal on drug policy · 2022Article
- Non-medical cannabis use: international policies and outcomes overview. An outline for Portugal.Trends in psychiatry and psychotherapy · 2022Article
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- Article
- Prevention of psychosis: moving on from the at-risk mental state to universal primary prevention.Psychological medicine · 2021Article
- Cannabis Use, Cannabis Use Disorder, and Comorbid Psychiatric Illness: A Narrative Review.Journal of clinical medicine · 2020Review
- Psychotic disorders hospitalizations associated with cannabis abuse or dependence: A nationwide big data analysis.International journal of methods in psychiatric research · 2020Observational
Corrections and comments
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Authors and funding
3 authors.
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Abstract
objectivesWe aimed to describe and correlate the hospital panorama of psychotic disorders (PD) with cannabis use (CU) trends in all Portuguese public hospitals.
methodsWe conducted a retrospective observational study that analysed all hospitalizations that occurred in Portuguese public hospitals from 2000 to 2015. Hospitalizations with a primary diagnosis of PD or schizophrenia were selected based on Clinical Classification Software diagnostic single-level 659. Episodes associated with CU were identified by the International Classification of Diseases Version 9, Clinical Modification code 304.3/305.2 that correspond to cannabis dependence/cannabis abuse.
resultsThe number of hospitalizations with a primary diagnosis of PD and schizophrenia associated with CU rose 29.4 times during the study period, from 20 to 588 hospitalizations yearly (2000 and 2015, respectively) with a total of 3,233 hospitalizations and an average episode cost of €3,500. Male patients represented 89.8% of all episodes, and the mean/median age at discharge were 30.66/29.00 years, respectively. From all hospitalizations with a primary diagnosis of PD or schizophrenia, the ones with a secondary diagnosis of CU rose from 0.87% in 2000 to 10.60% in 2015.
conclusionsThe increase on secondary diagnosis coding and the change on cannabis patterns of consumption in Portuguese population with an increasing frequency of moderate/high dosage cannabis consumers may explain the rise on PD hospitalizations.
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