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Hylan G-F 20 Versus Low Molecular Weight Hyaluronic Acids for Knee Osteoarthritis: A Meta-Analysis

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Abstract

Background

Hyaluronic acid injection has been reported to decrease pain compared with baseline levels in knee joint osteoarthritis. Hylan G-F 20 is distinguished from the other products by its chemical structure and relatively higher molecular weight. Many trials have compared hylan G-F 20 and low molecular weight hyaluronic acids (LMWHAs); however, their relative efficacy and safety are still debated.

Objective

The aim was to compare the effectiveness and safety of intra-articular injection of hylan G-F 20 and LMWHA in the treatment of knee joint osteoarthritis.

Methods

A comprehensive search of the literature up to February 2016 was performed; multiple databases were searched with ‘Synvisc’ or ‘hylan’ or ‘hyaluronan’ as free word terms. The pain-related outcomes and treatment-related adverse events from intent-to-treat analyzed studies were pooled for meta-analysis; other functional outcomes were included in the qualitative analysis.

Results

Twenty trials with a total of 3034 patients and 3153 knees were included, with a pooled dropout rate of 7.2 %. The pooled pain-related outcomes at 2 to 3 months reached a statistically significant difference in favor of hylan G-F 20 (I 2 = 88 %; random effects; P = 0.02), and the significance still existed with exclusion (in order to eliminate heterogeneity) of the three studies that most favored hylan G-F 20 (I 2 = 51 %; fixed effect; P = 0.03). No significant difference was reached for other group and subgroup analyses. No significant difference was reached in comparing the patients with treatment-related adverse events (seven trials; 2025 patients; P = 0.13) or the treatment-related adverse events (six trials; 1633 patients; P = 0.14).

Conclusion

According to the current results, limited evidence showed a superior effect favoring hylan G-F 20 over LMWHA in the period from 2 to 3 months post-injection for pain-related outcomes. There was no evidence of increased risk of treatment-related adverse events for hylan G-F 20 injections.

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Author Contributions

The corresponding author certifies that all authors approved the entirety of the submitted material and contributed actively to the study. ZHM conceived and designed the study; ZHM and LXJ searched the databases and identify the included articles; LHL, LY, and ZHM extracted and confirmed the protocol defined data elements; ZHM and LC wrote the manuscript; ZHM, LHL, LXJ, and LC contributed to the discussion and reviewed the manuscript. ZHM acts as guarantor for the paper. All authors saw, commented upon, and approved the final version of the paper.

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Correspondence to Hongmou Zhao.

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Conflict of interest

ZHM, LHL, LY, LXJ, and LC declare that they have no conflicts of interest.

Funding

No source of funding was used to assist in the preparation of this study.

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Zhao, H., Liu, H., Liang, X. et al. Hylan G-F 20 Versus Low Molecular Weight Hyaluronic Acids for Knee Osteoarthritis: A Meta-Analysis. BioDrugs 30, 387–396 (2016). https://doi.org/10.1007/s40259-016-0186-1

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  • DOI: https://doi.org/10.1007/s40259-016-0186-1

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