Trial reportBMC musculoskeletal disorders2021
The comparison effects of intra-articular injection of Platelet Rich Plasma (PRP), Plasma Rich in Growth Factor (PRGF), Hyaluronic Acid (HA), and ozone in knee osteoarthritis; a one year randomized clinical trial.
Trial report in BMC musculoskeletal disorders, 2021. The graph could read no effect estimate from its abstract, so it casts no vote on the map. It is linked to trial NCT07662512 (Is Intra-articular Injection of High-concentration Ozone), which is not on this map. Cited by 92 papers, 19 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.
Is Intra-articular Injection of High-concentration Ozone (O2-O3) More Effective in Treating Knee Osteoarthritis?: A Multicenter Clinical Trial
Who cites it
92 citing papers in PubMed, 19 syntheses or guidelines pooled it, 166 citations in OpenAlex.
- Autologous platelet-rich plasma versus hyaluronic acid, corticosteroids or saline for knee osteoarthritis: can blood draw volume serve as a proxy for platelet dose? A systematic review and meta-analysis.International orthopaedics · 2026Pooled it
- Investigating the therapeutic impact of platelet-rich plasma on knee, hip, and traumatic osteoarthritis: a meta-analysis and systematic review.BMC musculoskeletal disorders · 2026Pooled it
- The potential of platelet-rich plasma and PRP-derived biologics for neurological disorders: mechanisms and translational research.Frontiers in immunology · 2026Pooled it
- 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
- [Efficacy of Intra-Articular Platelet-Rich Plasma in Knee Osteoarthritis: a Systematic Review and Meta-Analysis].Acta chirurgiae orthopaedicae et traumatologiae Cechoslovaca · 2025Pooled it
- Intra-articular Hyaluronic Acid Injections May Be Beneficial in Patients with Less Advanced Knee Osteoarthritis: A Systematic Review of Randomised Controlled Trials.Sports medicine (Auckland, N.Z.) · 2025Pooled it
- The efficacy of platelet-rich plasma preparation protocols in the treatment of osteoarthritis: a network meta-analysis of randomized controlled trials.Journal of orthopaedic surgery and research · 2025Pooled it
- Randomized Controlled Trials Studying Nonoperative Treatments of Osteoarthritis Often Use Misleading and Uninformative Control Groups: A Systematic Review.Clinical orthopaedics and related research · 2025Pooled it
- Comparison of hyaluronic acid and platelet-rich plasma in knee osteoarthritis: a systematic review.BMC musculoskeletal disorders · 2025Pooled it
- Long-term effectiveness of intra-articular injectables in patients with knee osteoarthritis: a systematic review and Bayesian network meta-analysis.Journal of orthopaedic surgery and research · 2025Pooled it
- Intra-articular injections of hyaluronic acid versus plasma rich in growth factors (PRGF) for knee osteoarthritis: a meta-analysis of randomised controlled trials : A meta-analysis.Orthopadie (Heidelberg, Germany) · 2025Pooled it
- Pooled it
- Intra-articular injections of ozone versus hyaluronic acid for knee osteoarthritis: a level I meta-analysis.European journal of orthopaedic surgery & traumatology : orthopedie traumatologie · 2024Pooled it
- Efficacy of intra-ovarian injection of autologous platelet-rich plasma in women with poor responders: a systematic review and meta-analysis.Archives of gynecology and obstetrics · 2024Pooled it
- The effectiveness of instrument-assisted soft tissue mobilization on range of motion: a meta-analysis.BMC musculoskeletal disorders · 2024Pooled it
- Orthobiologics as an adjunct in treatment of femoroacetabular impingement syndrome: cell-based therapies facilitate improved postoperative outcomes in the setting of acetabular chondral lesions-a systematic review.Knee surgery, sports traumatology, arthroscopy : official journal of the ESSKA · 2023Pooled it
- The Influence of Industry Affiliation on Randomized Controlled Trials of Platelet-Rich Plasma for Knee Osteoarthritis.The American journal of sports medicine · 2023Pooled 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
- Pooled it
- Safety and efficacy of placental mesenchymal stromal cells-derived extracellular vesicles in knee osteoarthritis: a randomized, triple-blind, placebo-controlled clinical trial.BMC musculoskeletal disorders · 2024Trial
32 more citing papers are in PubMed but not listed here.
Corrections and comments
PubMed lists nothing against this paper. Absence here is not a guarantee, only a check that was made.
Authors and funding
7 authors at 2 institutions in 2 countries.
Funding
Abstract
backgroundOur study compare the short and long-term efficacy of the intra articular injections (IAIs) of hyaluronic acid (HA), platelet-rich plasma (PRP), plasma rich in growth factors (PRGF), and ozone in patients with knee osteoarthritis (OA).
methodsIn this randomized clinical trial, 238 patients with mild to moderate knee OA were randomized into 4 groups of IAIs: HA (3 doses weekly), PRP (2 doses with 3 weeks interval), PRGF (2 doses with 3 weeks interval), and Ozone (3 doses weekly). Our outcome measures were the mean changes from baseline (immediately from the first injections) until 2,6, and 12 months post intervention in scores of visual analog scale (VAS), Western Ontario and McMaster Universities Osteoarthritis Index (WOMAC), and Lequesne index.
resultsA total of 200 patients enrolled in the final analysis. The mean age of patients was 56.9 ± 6.3 years, and 69.5% were women. In 2 months follow up, significant improvement of pain, stiffness, and function were seen in all groups compared to the baseline, but the ozone group had the best results (P < 0.05). In 6 month follow up HA, PRP, and PRGF groups demonstrated better therapeutic effects in all scores in comparison with ozone (P < 0.05). At the end of the 12th month, only PRGF and PRP groups had better results versus HA and ozone groups in all scores (P < 0.05). Despite the fact that ozone showed better early results, its effects begin to wear off earlier than other products and ultimately disappear in 12 months.
conclusionsOzone injection had rapid effects and better short-term results after 2 months, but its therapeutic effects did not persist after 6 months and at the 6-month follow up, PRP,PRGF and HA were superior to ozone. Only patients in PRP and PRGF groups improved symptoms persisted for 12 months. Therefore, these products could be the preferable choices for long-term management.
trial registrationRegistered in the Iranian Center of Clinical Trials ( www.irct.ir ) in 11/11/2017 with the following code: IRCT2017082013442N17.
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What Socratic 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 Socratic graph.