Trial reportPloS one2017
Comparison between intra-articular ozone and placebo in the treatment of knee osteoarthritis: A randomized, double-blinded, placebo-controlled study.
Trial report in PloS one, 2017. The graph could read no effect estimate from its abstract, so it casts no vote on the map. An erratum has been issued. Cited by 47 papers, 2 of them syntheses that pooled 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.
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.
Who cites it
47 citing papers in PubMed, 2 syntheses or guidelines pooled it, 111 citations in OpenAlex.
- The time-effect relationship of intra-articular ozone injection for knee osteoarthritis: a systematic review and meta-analysis.Frontiers in pain research (Lausanne, Switzerland) · 2026Pooled it
- Effects of externally-applied, non-pharmacological Interventions on short- and long-term symptoms and inflammatory cytokine levels in patients with knee osteoarthritis: a systematic review and network meta-analysis.Frontiers in immunology · 2023Pooled it
- Efficacy of two doses of intra-articular ozone therapy for pain and functional mobility in knee osteoarthritis: a double-blind randomized trial.Advances in rheumatology (London, England) · 2025Trial
- Ozone Therapy versus Hyaluronic Acid Injections for Pain Relief in Patients with Knee Osteoarthritis: Preliminary Findings on Molecular and Clinical Outcomes from a Randomized Controlled Trial.International journal of molecular sciences · 2023Trial
- Ozone Therapy as a Redox-Modulating Strategy in Degenerative Musculoskeletal Diseases: A Clinical-Mechanistic Review.Journal of clinical medicine · 2026Review
- Temporal Hierarchy of Hydrogels and Orthobiologic Therapies for Knee Osteoarthritis.Gels (Basel, Switzerland) · 2026Review
- Article
- Ozone therapy in femoral head necrosis: a perspective on biomarker-guided treatment rationalization and mechanistic exploration.Frontiers in medicine · 2026Article
- Comparative Effectiveness of Low-Dose Intra-Articular Ozone Therapy for Pain and Functional Outcomes in Patients with Knee Osteoarthritis: A Retrospective Cohort Study.Journal of pain research · 2026Article
- The evolving landscape of minimally invasive procedures in musculoskeletal diseases-Part II.Frontiers in medicine · 2026Review
- Ozone therapy for knee osteoarthritis: a literature visualization analysis of research hotspots and prospects.Medical gas research · 2025Review
- WNT Signaling Factors as Potential Synovial Inflammation Moderators in Patients with Hip Osteoarthritis.Biomedicines · 2025Article
- Effects of Ozone Therapy on Adverse Events and Inflammatory Markers in Patients With Hepatocellular Carcinoma Undergoing Interventional Therapy.Gastroenterology research and practice · 2025Article
- Medical Ozone as a Therapeutic Option in Musculoskeletal Pain Control: A Critical Review of Clinical Trials Considering Safety and Quality Indicators for Procedures and Devices.The Yale journal of biology and medicine · 2024Review
- Ozone therapy in musculoskeletal medicine: a comprehensive review.European journal of medical research · 2024Review
- Adjunct treatment with ozone to enhance therapy of knee osteoarthritis: preliminary results.Clinical rheumatology · 2024Article
- The effect of dextrose prolotherapy on patients diagnosed with knee osteoarthritis: A comprehensive systematic review and meta-analysis of interventional studies.Health science reports · 2024Review
- Syndecans, Exostosins and Sulfotransferases as Potential Synovial Inflammation Moderators in Patients with Hip Osteoarthritis.International journal of molecular sciences · 2024Article
- Article
- Efficacy and safety of ozone therapy for knee osteoarthritis: an umbrella review of systematic reviews.Frontiers in physiology · 2024Review
Corrections and comments
- Erratum issued
Authors and funding
6 authors at 2 institutions in 1 country.
Funding
No grant is acknowledged in the PubMed record.
Abstract
objectiveThe aim of the trial was to determine the effectiveness of oxygen-ozone injections on knee osteoarthritis concerning pain reduction, joint functional improvement, and quality of life.
methodsIn this randomized, double-blinded, placebo controlled clinical trial, 98 patients with symptomatic knee osteoarthritis (OA) were randomized into two groups receiving intra-articular 20 μg/ml of ozone (OZ) or placebo (PBO) for 8 weeks. The efficacy outcomes for knee OA were the Visual Analogue Scale (VAS), Lequesne Index, Timed Up and Go Test (TUG Test), SF-36, Western Ontario and McMaster Universities Osteoarthritis Index (WOMAC), and Geriatric Pain Measure (GPM).
resultsAfter 8 weeks of treatment, ozone was more effective than the placebo: VAS [mean difference (MD) = 2.16, p < 0.003 (CI 95% 0.42-3.89)], GPM [MD = 18.94, p < 0.004 (CI 95% 3.43-34.44)], LEQ [MD = 4.05, p < 0.001 (CI 95% 1.10-7.00)], WOMAC (P) [median of diff = 9.999, p = 0.019 (CI 95% 0.000-15.000)], WOMAC (JS) [median of diff = 12.499, p < 0.001 (CI 95% 0.000-12.500)], WOMAC (PF) = [median of diff = 11.760, p = 0.003 (CI 95% 4.409-19.119)], TUG (no statistical difference) and SF-36 (FC) [(MD = -25.82, p < 0.001 (CI 95% 33.65-17.99)], SF-36 (PH) [MD = -40.82, p < 0.001 (CI 95% -54.48-27.17)], SF-36 (GSH) [MD = -3.38, p < 0.001 (CI 95% -4.83-1.93)], SF-36 (SA) [MD = 2.17, p < 0.001 (CI 95% -19.67-8.24), SF-36 (EA) [MD = -35.37, p < 0.001 (CI 95% -48.86-21.89)]. Adverse events occurred in 3 patients (2 in the placebo group and 1 in the ozone group) and included only puncture accidents.
conclusionsThe study confirms the efficacy of ozone concerning pain relief, functional improvement, and quality of life in patients with knee osteoarthritis.
trial registrationInternational Standard Randomized Controlled Trial Number Register ISRCTNR55861167.
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What OpenQuestion holds
Registered trials
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.