Evidence map›Paper›PMID 42169234›Full record

SynthesisPsychiatry and clinical neurosciences2026

Effectiveness and safety of hyperbaric oxygen therapy for psychiatric disorders: A systematic review and meta-analysis.

Huda F Al-Shamali, Kirandeep Shocker, Jahnvi Thakkar, Qiaowei Lin, Reinhard Janssen-Aguilar, Wendy Lou, Joshua Granek, Shawn Rhind, Benjamin T Dunkley, Isabelle Vallee and 3 more

Abstract readSystematic ReviewMeta-AnalysisReview
In one paragraph

Synthesis in Psychiatry and clinical neurosciences, 2026. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 2 papers.

0numbers the graph read from it
0cells of the map it votes in
2citing papers in PubMed
–field-weighted citation impact
1 · What the graph read from it

What it found

Each row is one number read from the abstract, on the scale the paper reported it, with its interval. Left of the dashed line favours the treatment, right favours the comparator. Under each row is the sentence it came from. New to these charts? A ten-minute tutorial.

The abstract states no effect estimate the extractor could read, or names no intervention and outcome on the map, so this paper lights no cell and moves no belief. It is still indexed, cited and linked below.

2 · The registry

The trial behind it

Trials whose registry record cites this paper, or whose number appears in the abstract. A trial that started after this paper was published is citing it as background, not reporting it.

Neither the registry nor the abstract names a trial number. If this is a trial report, that itself is worth knowing.

3 · Its place in the literature

Who cites it

2 citing papers in PubMed.

  1. Editorial: Hyperbaric oxygen therapy in psychiatry.Psychiatry and clinical neurosciences · 2026
    Article
  2. Review
4 · The record

Corrections and comments

PubMed lists nothing against this paper. Absence here is not a guarantee, only a check that was made.

5 · Who and what money

Authors and funding

13 authors.

Huda F Al-ShamaliAI for Mental Health Program, St. Michael's Hospital, Toronto, Ontario, Canada.
Kirandeep ShockerDepartment of Psychiatry, University of Toronto, Toronto, Ontario, Canada.
Jahnvi ThakkarHealth Sciences, McMaster University, Hamilton, Ontario, Canada.
Qiaowei LinAI for Mental Health Program, St. Michael's Hospital, Toronto, Ontario, Canada.
Reinhard Janssen-AguilarAI for Mental Health Program, St. Michael's Hospital, Toronto, Ontario, Canada.
Wendy LouDivision of Biostatistics, Dalla Lana School of Public Health, Toronto, Ontario, Canada.
Joshua GranekDefence Research & Development Canada, Toronto Research Centre, Toronto, Ontario, Canada.
Shawn RhindDefence Research & Development Canada, Toronto Research Centre, Toronto, Ontario, Canada.
Benjamin T DunkleyNeurosciences & Mental Health, Hospital for Sick Children Research Institute, Toronto, Ontario, Canada.
Isabelle ValleeCanadian Special Operations Forces Command, Ottawa, Ontario, Canada.
Mike CrouzatCanadian Special Operations Forces Command, Ottawa, Ontario, Canada.
Rakesh JetlyThe Institute of Mental Health Research, University of Ottawa, Royal Ottawa Hospital, Ottawa, Ontario, Canada.
Venkat BhatAI for Mental Health Program, St. Michael's Hospital, Toronto, Ontario, Canada.ORCID https://orcid.org/0000-0002-8768-1173

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

Psychiatric disorders such as major depressive disorder (MDD), posttraumatic stress disorder (PTSD), and anxiety are leading causes of disability and remain insufficiently treated in many patients. Hyperbaric oxygen therapy (HBOT), traditionally used in neurological care, has emerged as a potential intervention by delivering 100% oxygen at supra-atmospheric pressure to modulate neuroplasticity, inflammation, and cerebral perfusion. We conducted a systematic review and meta-analysis of studies evaluating HBOT in adults with psychiatric disorders across three databases. The prespecified primary endpoint was psychiatric symptom severity at treatment's end. Random-effects models were implemented in R (v4.4.0). Seventeen studies (n = 920) met inclusion criteria; nine randomized control trials (RCTs) contributed to the meta-analysis. For depressive symptoms, HBOT was associated with a large pooled effect (Cohen's d = -0.82; I

Indexed as

Anxiety DisordersHyperbaric OxygenationMajor Depressive DisorderOutcome Assessment, Health CareStress Disorders, Post-TraumaticHumansanxietydepressionhyperbaric oxygenationmeta‐analysispost‐traumatic stress disorder

Identifiers

PMID42169234
PMCPMC13537333

What OpenQuestion holds

Textmetadata
Read underepoch 390

Registered trials

None linked

Read under generation 80e0d062 · epoch 390. Bibliography from PubMed, PubMed Central and OpenAlex; grants from NIH RePORTER; trial links from ClinicalTrials.gov; estimates, votes and beliefs from the OpenQuestion graph.