Effect of psilocybin versus escitalopram on depression symptom severity in patients with moderate-to-severe major depressive disorder: observational 6-month follow-up of a phase 2, double-blind, randomised, controlled trial
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Résumé
Background: Psilocybin therapy (PT) produces rapid and persistent antidepressant effects in major depressive disorder (MDD). However, the long-term effects of PT have never been compared with gold-standard treatments for MDD such as pharmacotherapy or psychotherapy alone or in combination. Methods: This is a 6-month follow-up study of a phase 2, double-blind, randomised, controlled trial involving patients with moderate-to-severe MDD. Participants were recruited from a hospital in the UK. Male or female patients with major depressive disorder (DSM-IV), moderate to severe depression (HAM-D ≥17), no MRI or SSRI contraindications, confirmed diagnosis by a GP or mental healthcare professional, aged 18-80, and competent in English were eligible. Patients were randomly assigned (1:1) to receive either two 25 mg doses of the psychedelic drug psilocybin administered orally combined with psychological support ('psilocybin therapy' or PT) and book-ended by further support or a 6-week course of the selective serotonin reuptake inhibitor (SSRI) escitalopram (administered daily at 10 mg for three weeks and 20 mg for the subsequent three weeks) plus matched psychological support ('escitalopram treatment' or ET). The primary outcome measure was change from baseline in the score on the 16-item Quick Inventory of Depressive Symptomatology-Self-Report (QIDS-SR-16) at week 6, which has been reported previously. Herein, we present results at the 6-month follow-up time point. Measures of social functioning, connectedness, and meaning in life constituted the study's secondary outcomes during follow-up. Safety in the follow-up period was not assessed. This trial is registered at ClinicalTrials.gov, NCT03429075. Findings: Between January 15th, 2019 and March 20th, 2020, 59 patients were enrolled and 30 (11 females [37%] and 19 males [63%]) were assigned to the psilocybin group and 29 (9 females [31%] and 20 males [69%]) to the escitalopram group. 25 participants in the PT group and 21 in the ET group completed the 6-month follow-up. At the 6-month follow-up, both PT and ET conditions yielded sustained improvements in depressive symptom severity. The mean between-condition difference in QIDS-SR-16 scores at 6-months was 1.51 (95% CI: -1.35, 4.38; p = 0.311). Secondary outcomes demonstrated that PT had greater mean between-condition differences in functioning (WSAS: -7.46; 95% CI: -12.4, -2.47; p < 0.001), psychological connectedness (WCS: 11.02; 95% CI: 1.25, 20.83; p = 0.033), and meaning in life (MLQ: 4.86; 95% CI: 0.67, 9.05; p = 0.021) compared to ET. Interpretation: Six-week intensive treatments with either psilocybin or escitalopram (with psychological support) for MDD were associated with long-term improvements in depressive symptom severity. The greater degree of improvement in the PT arm at follow-up on psychosocial functioning, meaning in life, and psychological connectedness suggests warrant future research. However, these results are descriptive and should be interpreted with caution. Key limitations of the study include its suboptimal power to detect small but meaningful differences between treatments, missing data, the potential use of additional interventions during the follow-up period, and reliance on self-reported treatment assessments. These factors may affect the interpretation of the study findings and should be considered when evaluating the results. Funding: The Alexander Mosley Charitable Trust and by the founding partners of Imperial College London's Centre for Psychedelic Research.
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Imitation des enseignantsNi prévalence calibrée, ni vérité terrain. Validation humaine à venir. Apprise à partir de 10 348 étiquettes directes de Codex et de 10 348 étiquettes directes de Gemma. Le mode candidate est l'union des têtes enseignantes seuillées; le consensus est leur intersection. Ces sorties portent le statut machine_predicted_unvalidated et ne sont ni des étiquettes humaines ni des étiquettes directes de modèles de pointe.
Scores Codex et Gemma par catégorie
| Catégorie | Codex | Gemma |
|---|---|---|
| Métarecherche | 0,002 | 0,001 |
| Méta-épidémiologie (sens strict) | 0,000 | 0,000 |
| Méta-épidémiologie (sens large) | 0,002 | 0,000 |
| Bibliométrie | 0,000 | 0,000 |
| Études des sciences et des technologies | 0,000 | 0,000 |
| Communication savante | 0,000 | 0,000 |
| Science ouverte | 0,000 | 0,000 |
| Intégrité de la recherche | 0,000 | 0,000 |
| Charge utile insuffisante (le modèle a refusé de juger) | 0,000 | 0,000 |
Scores machine (provisoires)
Les deux têtes enseignantes du modèle étudiant, lues sur ce travail. Un score ordonne la base pour la relecture; il n'affirme jamais une catégorie, et le statut de validation accompagne chaque rangée tel quel.
Scores de référence d'un modèle non mature (critères de maturité non atteints, 7 itérations). Un score ordonne; il n'affirme jamais une catégorie.
score_only:v0-immature-baseline · tel quel depuis la passe de notation : score_only signifie que le nombre peut ordonner les travaux, et qu'aucune étiquette de catégorie n'en découle