Conflict of Interest in the Assessment of Hyaluronic Acid Injections for Osteoarthritis of the Knee: An Updated Systematic Review.

Department of Orthopaedic Surgery, University of Michigan, 2912 Taubman Center, Ann Arbor, Michigan.
The Journal of arthroplasty (Impact Factor: 2.67). 07/2013; 28(8). DOI: 10.1016/j.arth.2013.05.034
Source: PubMed


The search results of a recent systematic review of prospective, randomized, placebo-controlled trials on hyaluronic acid injections for knee arthritis were updated and reviewed for funding source and qualitative conclusions. Forty-eight studies were identified; 30 (62.5%) were industry funded, and 3 (6.25%) were not. Fifteen (31.3%) studies did not identify a funding source. An association was observed between a reported potential financial conflict of interest of the author and the qualitative conclusion (P=0.018). None of the studies with a reported financial conflict of interest of at least one author had an unfavorable conclusion; 11 (35%) of the 31 studies with no industry-affiliated authors indicated that hyaluronic acid injection for knee osteoarthritis was no more effective than a placebo injection.

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