title: Publication and citation analysis of the Australian and New Zealand Journal of Ophthalmology and Clinical and Experimental Ophthalmology over a 10-year period: the evolution of an ophthalmology journal.
abstract: OBJECTIVE
  To analyse the pattern of change in publication content and citations generated by a mid-ranking ophthalmology journal as it evolved from the Australian and New Zealand Journal of Ophthalmology (ANZJO) to its successor, Clinical 0mp; Experimental Ophthalmology (CEO).
  
  
  METHODS
  The Science Citation Index was used to analyse the publications of ANZJO and CEO over two 10-year periods (1990-1999 and 2000-2009, respectively). Publication and citation patterns were analysed in terms of source authors, institutions and countries. As a secondary measure, journal impact factors (JIFs) were retrieved from the Journal Citation Reports at the end of each period.
  
  
  RESULTS
  Over the specified periods, 859 articles published in ANZJO were cited 1210 times, and 1529 articles published in CEO were cited 5374 times. Australia was the largest contributing country to both journals; however, the proportional contributions from other countries including New Zealand, UK, USA, India and China increased significantly in CEO. Articles were cited by authors from 793 institutions in 60 countries for ANZJO and 2997 institutions in 95 countries for CEO. The contribution by key authors (identified as the top 10 most-published authors) towards total journal publications was 24% in ANZJO, but only 16% in CEO; however, these publications were responsible for 26.6% and 28.8% of the total citations, respectively. With respect to the most recent JIFs, ANZJO was 0.433 in 1999 (ranked 33 of 43 journals) and CEO was 1.35 in 2008 (ranked 27 of 48 journals).
  
  
  CONCLUSIONS
  CEO has substantially increased the number of publications, citation counts and international sources compared with its well-established predecessor, ANZJO, over the assessed periods. CEO also appears to have a higher international profile with increasing citations counts from more countries. This evolution from a regional, to a more international, journal has been substantial and is reflected by a significant increment in JIF, and a modest increase in overall JIF-ranking, for CEO.
authors.affiliation: Department of Ophthalmology, New Zealand National Eye Centre, Faculty of Medical and Health Sciences, University of Auckland, Auckland, New Zealand.
authors.forename: Chi-Ying
authors.initials: CY
authors.lastname: Chou
authors.forename: Shenton Sl
authors.initials: SS
authors.lastname: Chew
authors.forename: Dipika V
authors.initials: DV
authors.lastname: Patel
authors.forename: Susan E
authors.initials: SE
authors.lastname: Ormonde
authors.forename: Charles Nj
authors.initials: CNj
authors.lastname: McGhee
mesh_terms: D001315:Australia; D001319:Authorship; D038622:Internationality; D055811:Journal Impact Factor; D009520:New Zealand; D009885:Ophthalmology; D017712:Peer Review, Research; D010506:Periodicals as Topic / Q000706:statistics & numerical data* / Q000639:trends; D013997:Time Factors