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Record W3080549645 · doi:10.1097/cxa.0000000000000090

Effects of Extended Cannabis Abstinence in Major Depressive Disorder

2020· article· en· W3080549645 on OpenAlex

Why this work is in the frame

A frame that forgets how it found something cannot be audited. These are the routes that admitted this work.

affAt least one author lists a Canadian institution in the pinned OpenAlex snapshot.
venuePublished in a venue whose home country is Canada.

Bibliographic record

VenueThe Canadian Journal of Addiction · 2020
Typearticle
Languageen
FieldMedicine
TopicCannabis and Cannabinoid Research
Canadian institutionsSt. Michael's HospitalUniversity of TorontoCentre for Addiction and Mental Health
Fundersnot available
KeywordsAnhedoniaAbstinenceMajor depressive disorderCannabisPsychiatryDepression (economics)PsychologyCannabis DependenceMoodPopulationBeck Depression InventoryHamilton Rating Scale for DepressionMedicineClinical psychologyAnxietySchizophrenia (object-oriented programming)

Abstract

fetched live from OpenAlex

ABSTRACT Background: Individuals with major depressive disorder (MDD) have higher rates of problematic cannabis use than the general population. Recent meta-analyses have found a link between cannabis use and increased risk for depression, suicidal behavior, and suicidal ideation. Few studies to date have examined the effects of cannabis use in individuals diagnosed with MDD. Objectives: We examined the effects of cannabis abstinence on clinical symptoms of depression in adults with comorbid cannabis use disorder (CUD) and MDD. Method: Participants with comorbid CUD and MDD (n = 11) underwent 28 days of cannabis abstinence. Mood symptoms were assessed weekly using the Hamilton Depression Rating Scale, the Beck Anxiety Inventory, the Snaith Hamilton Pleasure scale. Abstinence was biochemically verified using weekly urine assays for 11-nor-9-carboxy-Δ9-tetrahydrocannnabinol (THC-COOH), a metabolite of THC, and participants were rewarded with a contingent bonus if abstinence was confirmed. Results: 72.7% of study completers achieved abstinence. In all participants, including those who relapsed, urinary THC-COOH was significantly reduced throughout the study ( P = 0.002). Participants exhibited significant improvements in depressive symptoms (43.7% reduction from baseline; P = 0.008), especially anhedonia (88.7% reduction from baseline; P < 0.001). Scientific significance: Findings from this study suggest that extended abstinence from cannabis is associated with improvement of depressive symptoms, particularly anhedonia, in individuals with MDD and CUD. Our results indicate that addressing problematic cannabis use in the treatment of individuals with MDD can improve clinical outcomes. Contexte: Les personnes atteintes de trouble dépressif majeur (MDD) ont des taux plus élevés de consommation problématique de cannabis que la population générale. Des méta-analyses récentes ont trouvé un lien entre la consommation de cannabis et un risque accru de dépression, de comportement suicidaire et d’idées suicidaires. À ce jour, peu d’études ont examiné les effets de la consommation de cannabis chez les personnes diagnostiquées avec un MDD. Objectifs: Nous avons examiné les effets de l’abstinence de cannabis sur les symptômes cliniques chez les adultes atteints de trouble de morbidité qui souffrent d’un désordre de consommation de cannabis (CUD) et de MDD. Méthode: Les participants atteints de troubles de morbidité CUD et MDD (n = 11) ont subi 28 jours d’abstinence de cannabis. Les symptômes de l’humeur ont été évalués chaque semaine à l’aide de la Hamilton Depression Rating Scale , du Beck Anxiety Inventory, de la Snaith Hamilton Pleasure scale . L’abstinence a été vérifiée biochimiquement en utilisant des analyses d’urine hebdomadaires pour le 11-nor-9-carboxy-Δ9-tétrahydrocannnabinol (THC-COOH), un métabolite du THC, et les participants ont été récompensés par un bonus contingent si l’abstinence était confirmée. Résultats: 72,7% des finissants de l’étude ont atteint l’abstinence. Chez tous les participants, y compris ceux qui ont rechuté, le THC-COOH urinaire a été significativement réduit tout au long de l’étude ( P = 0,002). Les participants ont montré des améliorations significatives des symptômes dépressifs (réduction de 43,7% par rapport à la ligne de base; P = 0,008), en particulier de l’anhédonie (réduction de 88,7% par rapport à la ligne de base; P < 0,001). Importance scientifique: Les résultats de cette étude suggèrent que l’abstinence prolongée de cannabis est associée à une amélioration des symptômes dépressifs, en particulier de l’anhédonie, chez les personnes atteintes de MDD et de CUD. Nos résultats indiquent que la lutte contre la consommation problématique de cannabis dans le traitement des personnes atteintes de MDD peut améliorer les résultats cliniques.

Fetched live from OpenAlex and de-inverted. Abstracts are not stored in this database: the inverted indexes are 8.6 GB of the frame’s 9.3 GB of text, and the host has 13 GB free.

Full frame distilled prediction

Teacher imitation

Not calibrated prevalence, not ground truth. Human validation pending. Learned from the 10,348 direct Codex labels and 10,348 direct Gemma labels. Candidate is the union of thresholded teacher heads; consensus is their intersection. These outputs are machine_predicted_unvalidated and are not human labels or direct frontier model labels.

metaresearch head score (Codex)0.000
metaresearch head score (Gemma)0.001
Version: codex-gemma-dda1882f352aValidation status: machine_predicted_unvalidated
Candidate categoriesnone
Consensus categoriesnone
DomainCandidate signal: none · Consensus signal: none
Study designCandidate signal: Observational · Consensus signal: none
GenreCandidate signal: Empirical · Consensus signal: Empirical
Teacher disagreement score0.829
Threshold uncertainty score0.986

Codex and Gemma teacher scores by category

CategoryCodexGemma
Metaresearch0.0000.001
Meta-epidemiology (narrow)0.0000.000
Meta-epidemiology (broad)0.0000.000
Bibliometrics0.0000.000
Science and technology studies0.0000.000
Scholarly communication0.0000.000
Open science0.0000.000
Research integrity0.0000.000
Insufficient payload (model declined to judge)0.0000.000

Machine scores (provisional)

The two teacher heads of the student model, read on this work. A score orders the frame for review; it never asserts a category, and the validation status ships verbatim with every row.

Baseline scores from an immature model (maturity gate not passed, 7 training rounds). Scores rank; they never assert a category.

Opus teacher head0.009
GPT teacher head0.249
Teacher spread0.240 · how far apart the two teachers sit on this one work
Validation statusscore_only:v0-immature-baseline · verbatim from the scoring run: score_only means the number may rank works, and no category label ships from it