title: Scientific research output in orthopaedics from China and other top-ranking countries: a 10-year survey of the literature.
abstract: Orthopaedics-related diseases and conditions are a significant burden worldwide. In this study, we aimed to compare the quantity and quality of research output in the field of orthopaedics from Mainland China (MC), USA, UK, Japan and Germany.
  
  
  
  The USA, UK, Japan, Germany and MC.
  
  
  
  We selected orthopaedics journals from the subject category 'orthopedics' from the Science Citation Index Expanded (SCIE).
  
  
  
  The number of publications, the number of publications in the surveyed publication types, impact factor (IF) and citations from the corresponding country from 2005 to 2014 were collected for quantity and quality comparisons.
  
  
  
  A total of 128 895 articles were published worldwide in orthopaedics-related journals from 2005 to 2014. The USA contributed the largest proportion (31 190 (24.20%)), followed by the UK (6703 (5.20%)), Japan (5718 (4.41%)), Germany (4701 (3.66%)) and MC (3389 (2.63%)). Publications from MC represented the fewest, but this quantity is rapidly increasing. The quantity of annual publications from MC has exceeded that of Germany since 2012. The USA plays a predominant role in all kinds of publication types under investigation in the study, except in the category of meta-analysis. MC was in the last place for cumulative IFs, and the average IF actually decreased from the beginning of the study. For total and average citations, MC still lags behind the other countries in the study.
  
  
  
  The USA has occupied the dominant place in orthopaedics-related research for the last 10 years. Although MC has made great progress in the number of published works in the field of orthopaedics over the last 10 years, the quality of these publishing efforts needs further improvement.
authors.affiliation: Department of Orthopedics, Changhai Hospital, Second Military Medical University, Shanghai, People's Republic of China.
authors.forename: Yuming
authors.initials: Y
authors.lastname: Zou
authors.affiliation: Department of Orthopedics, Changhai Hospital, Second Military Medical University, Shanghai, People's Republic of China.
authors.forename: Quan
authors.initials: Q
authors.lastname: Li
authors.affiliation: Department of Orthopedics, Changhai Hospital, Second Military Medical University, Shanghai, People's Republic of China.
authors.forename: Weidong
authors.initials: W
authors.lastname: Xu
mesh_terms: D015706:Bibliometrics; D035843:Biomedical Research; D002681:China; D000068456:Clinical Studies as Topic; D005858:Germany; D019538:Health Care Surveys; D006801:Humans; D007564:Japan; D055811:Journal Impact Factor; D019637:Orthopedic Procedures / Q000706:statistics & numerical data*; D009985:Orthopedics; D011642:Publications; D006113:United Kingdom; D014481:United States
keywords: Citations; Impact Factor; Orthopedics; Publications; Science Citation Index Expanded (SCIE)