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. 2022 May 26;10(5):23259671221093074.
doi: 10.1177/23259671221093074. eCollection 2022 May.

Assessment of Characteristics and Methodological Quality of the Top 50 Most Cited Articles on Platelet-Rich Plasma in Musculoskeletal Medicine

Amador Bugarin  1 , Grant Schroeder  1 , Brendan Y Shi  2 , Kristofer J Jones  2 , Thomas J Kremen Jr  2
Affiliations

Assessment of Characteristics and Methodological Quality of the Top 50 Most Cited Articles on Platelet-Rich Plasma in Musculoskeletal Medicine

Amador Bugarin et al. Orthop J Sports Med. .

Abstract

Background: The wide range of clinical applications and controversial scientific evidence associated with platelet-rich plasma (PRP) therapy in musculoskeletal medicine requires an examination of the most commonly cited studies within this field.

Purpose: To identify the 50 most cited articles on PRP, assess their study design, and determine any correlations between the number of citations and level of evidence (LoE) or methodological quality.

Study design: Cross-sectional study.

Methods: The Web of Science database was queried to identify the top 50 most cited articles on PRP in orthopaedic surgery. Bibliometric characteristics, number of citations, and LoE were recorded. Methodological quality was evaluated using the Modified Coleman Methodology Score (MCMS), Methodological Index for Non-randomized Studies (MINORS), and Minimum Information for Studies Evaluating Biologics in Orthopaedics (MIBO). The Pearson correlation coefficient and Spearman correlation coefficient (r S) were used to determine the degree of correlation between the number of citations or citation density and LoE, MCMS, MINORS score, and MIBO score. Student t tests were performed for 2-group comparisons.

Results: The top 50 articles were published between 2005 and 2016 in 21 journals. The mean number of citations and citation density were 241 ± 94 (range, 151-625) and 23 ± 8, respectively, and the mean LoE was 2.44 ± 1.67, with 15 studies classified as LoE 1. The mean MCMS, MINORS score, and MIBO score were 66.9 ± 12.6, 16 ± 4.7, and 12.4 ± 3.7, respectively. No correlation was observed between the number of citations or citation density and LoE, MCMS, MINORS score, and MIBO score. A significant difference (P = .02) was noted in LoE in articles from the United States (3.56 ± 1.7) versus outside the United States (2 ± 1.5). Seven of the 8 in vivo studies were published between 2005 and 2010, whereas 19 of the 25 clinical outcome investigations were published between 2011 and 2016. Studies that were published more recently were found to significantly correlate with number of citations (r S = -0.38; P = .01), citation density (r S = 0.36; P = .01), and higher LoE (r S = 0.47; P = .01).

Conclusion: The top 50 most cited articles on PRP consisted of high LoE and fair methodological quality. There was a temporal shift in research from in vivo animal studies toward investigations focused on clinical outcomes.

Keywords: PRP; level of evidence; methodological quality; orthobiologics; platelet-concentrated therapy; platelet-rich plasma.

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Conflict of interest statement

One or more of the authors has declared the following potential conflict of interest or source of funding: K.J.J. has received education payments from Arthrex and Micromed; consulting fees from Linvatec; speaking fees from Arthrex and Linvatec; honoraria from Joint Restoration Foundation, Musculoskeletal Transplant Foundation, and Vericel; and hospitality payments from Aesculap and DePuy. T.J.K. received research support from the US Department of Veterans Affairs (project No. 2020-000059) and has received education payments from Micromed, consulting fees from Heron Therapeutics, honoraria from Fidia Pharma and Musculoskeletal Transplant Foundation, and hospitality payments from RTI and Smith & Nephew. AOSSM checks author disclosures against the Open Payments Database (OPD). AOSSM has not conducted an independent investigation on the OPD and disclaims any liability or responsibility relating thereto.

Figures

Figure 1.
Figure 1.
Distribution of top 50 most cited platelet-rich plasma–related articles by decade of publication.
Figure 2.
Figure 2.
Distribution of top 50 most cited platelet-rich plasma–related articles by country of origin.
Figure 3.
Figure 3.
Distribution of top 50 most cited platelet-rich plasma–related articles by study type.
Figure 4.
Figure 4.
Distribution of top 50 most cited articles by level of evidence (LoE).
See this image and copyright information in PMC

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