SynthesisJournal of orthopaedic surgery and research2020
Platelet-rich plasma versus hyaluronic acid in the treatment of knee osteoarthritis: a meta-analysis.
Synthesis in Journal of orthopaedic surgery and research, 2020. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 81 papers, 13 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
81 citing papers in PubMed, 13 syntheses or guidelines pooled it.
- Assessment of adverse events and safety associated with intra-articular platelet-rich plasma injections compared to other injectates for knee osteoarthritis: A systematic review and meta-analysis.PM & R : the journal of injury, function, and rehabilitation · 2026Pooled it
- Comparative efficacy of platelet-rich plasma monotherapy versus combination therapies for knee osteoarthritis: a systematic review and network meta-analysis.Journal of orthopaedic surgery and research · 2026Pooled it
- The Effects of Hyaluronic Acid on Gait Parameters in Patients with Knee Osteoarthritis: A Systematic Literature Review.Medicina (Kaunas, Lithuania) · 2025Pooled it
- Intra-articular injections of platelet-rich plasma combined with hyaluronic acid versus platelet-rich plasma alone in the treatment of knee osteoarthritis: a systematic review and meta-analysis.European journal of orthopaedic surgery & traumatology : orthopedie traumatologie · 2025Pooled it
- A critical overview of systematic reviews and meta-analyses of intra-articular injection of platelet rich plasma versus hyaluronic acid for knee osteoarthritis.Clinical rheumatology · 2025Pooled it
- Pooled it
- Research trends and hotspots of acupuncture for knee osteoarthritis from 2004 to 2024: a bibliometric analysis.Frontiers in medicine · 2025Pooled it
- Platelet rich plasma injections for knee osteoarthritis: an overview of systematic reviews.Frontiers in physiology · 2025Pooled it
- Platelet-rich Plasma for the Treatment of Neuropathic Pain: A Systematic Review.Current drug research reviews · 2025Pooled it
- Platelet lysate for the treatment of osteoarthritis: a systematic review of preclinical and clinical studies.Musculoskeletal surgery · 2024Pooled it
- Cell therapies for chondral defects of the talus: a systematic review.Journal of orthopaedic surgery and research · 2022Pooled it
- Pooled it
- Mesenchymal stem cells and platelet rich plasma therapy for knee osteoarthritis: an umbrella review of systematic reviews with meta-analysis.Annals of Saudi medicinePooled it
- Efficacy and safety of a combination of platelet-rich plasma with non-crosslinked hyaluronic acid versus a crosslinked hyaluronic acid, in single-injection for knee osteoarthritis. Randomized, controlled, multicenter, non-inferiority trial.BMC musculoskeletal disorders · 2026Trial
- Clinical efficacy of cell-free fat extract and its effects on bone marrow edema in patients with early to mid-stage knee osteoarthritis: a clinical trial in comparison with hyaluronic acid.Journal of orthopaedic surgery and research · 2025Trial
- Leukocytes Do Not Influence the Safety and Efficacy of Platelet-Rich Plasma Injections for the Treatment of Knee Osteoarthritis: A Double-Blind Randomized Controlled Trial.The American journal of sports medicine · 2024Trial
- Clinical Efficacy of Intra-Articular Injection with P-PRP Versus that of L-PRP in Treating Knee Cartilage Lesion: A Randomized Controlled Trial.Orthopaedic surgery · 2023Trial
- Comparative efficacy of ultrasound-guided intra-articular injection of platelet-rich plasma (PRP), hydrolyzed type I collagen, and hyaluronic acid in patients with knee osteoarthritis: a randomized controlled trial.Future science OA · 2026Article
- Contribution of platelet-rich plasma to the surgical treatment of rotator cuff tear: An experimental study.Biomedical reports · 2026Article
- Review
21 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
6 authors.
Funding
No grant is acknowledged in the PubMed record.
Abstract
backgroundThis study aimed to evaluate the clinical efficacy of platelet-rich plasma (PRP) injection compared with hyaluronic acid (HA) injection for patients undergoing knee osteoarthritis.
methodsWe systematically searched electronic databases including PubMed, Embase, Web of Science, and the Cochrane Library on January 23, 2020 to identify relevant studies issued in English languages. The outcomes evaluating the efficacy of knee osteoarthritis (KOA) treatment were Western Ontario and McMaster Universities Arthritis Index (WOMAC) scores (WOMAC pain, function, stiffness, and total scores) at 1, 3, 6, and 12 months; International Knee Documentation Committee (IKDC) scores, Lequesne Index score, Visual Analog Scale (VAS) scores, EQ-VAS scores, and KOOS scores. The pooled data were analyzed by Stata 12.0.
resultsA total of 20 RCTs were enrolled in the present meta-analysis. The pooled results demonstrated that platelet-rich plasma (PRP) injection reduced pain more effectively than hyaluronic acid (HA) injection at 6-month and 12-month follow-up evaluated by WOMAC pain scores and VAS scores. EQ-VAS in the patients treated with PRP injection was lower than that in patients with HA injection at 12 months. Moreover, the patients with PRP injection had a better function recovery than those with HA injection at 1-month, 3-month, 6-month, and 12-month follow-up, as evaluated by WOMAC function scores. WOMAC total scores showed significant difference at 6-month and 12-month follow-up. The IKDC scores indicated PRP injection was significantly more effective than HA injection at 3 months and 6 months. However, the Lequesne Index scores, KOOS scores, and adverse events did not show any significant difference between groups.
conclusionIntra-articular PRP injection appeared to be more efficacious than HA injection for the treatment of KOA in terms of short-term functional recovery. Moreover, PRP injection was superior to HA injection in terms of long-term pain relief and function improvement. In addition, PRP injection did not increase the risk of adverse events compared to HA injection.
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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.