Rheumatol Int (2013) 33:361–367 DOI 10.1007/s00296-012-2428-y ORIGINAL ARTICLE Presentation of psoriatic arthritis in the literature: a twenty-year bibliometric evaluation Ahmad-Reza Jamshidi • Farhad Gharibdoost • Abdolhadi Nadji • Mohammadali Nikou • Gholamreza Habibi • Amirhossein Mardani • Marjan Ghaemi Received: 28 December 2011 / Accepted: 11 March 2012 / Published online: 27 March 2012 � Springer-Verlag 2012 Abstract Psoriatic arthritis is an inflammatory arthritis and journals; USA, university of Toronto, ‘‘Journal of disabling patients with psoriasis. Bibliometric studies are Rheumatology,’’ ‘‘Annals of The Rheumatic Diseases,’’ and tools for evaluating scientific productions in different ‘‘Arthritis and Rheumatism’’ have special contributions to countries, universities as well as publications related to a body of literature published under this topic, respectively. special topic. We aimed to perform a scientometric study to evaluate articles published under ‘‘Psoriatic arthritis’’ topic Keywords Psoriatic arthritis � Bibliometric and also attempted to compare publications of different authors, countries, universities, and journals related to this topic. Study was performed on all articles published between Introduction 1989 and 2009. The ISI web of science was our main source. Two key words, ‘‘Psoriatic arthritis’’ and ‘‘Psoriatic Psoriatic arthritis is a chronic inflammatory arthritis dis- arthropathy,’’ were used to conduct search. Original articles abling patients with psoriasis and seronegative for rheu- were subject of further evaluation. A whole number of 3,727 matoid factor in most cases [1, 2]. The term was first article was result of our search. From this number, 1,961 described by Pierre Bazin in 1860 [3]. Then, condition was (52.6 %) were original articles. Whole original articles were studied more extensively by Bourdillon in 1888 [4]. cited 38,613 times with average citations per item of 19.69. Since different studies have used variable criteria for Gladman DD was the most popular author in this field. diagnosis, there are controversial results regarding definite Articles were mostly in English (91.3 %). USA was the prevalence of arthritis among psoriatic patients [5]. Prev- leading country in producing article under this topic with 463 alence of this condition has been estimated to be about (23.6 %) publications. University of Toronto was the first 30 % in psoriatic patients [6, 7] and 0.1–0.5 % in general rank institution while publishing 125 (6.4 %) articles. More population [8–10]. Psoriatic arthritis affects both genders than half of articles were published under ‘‘Rheumatology’’ equally and starts at fourth decade of life. It can involve subject. ‘‘Journal of Rheumatology,’’ ‘‘Annals of the Rheu- both axial and peripheral joints [6, 7]. Psoriatic arthritis matic Diseases,’’ and ‘‘Arthritis and Rheumatism’’ were impose great burden of physical and psychological prob- three journals with highest number of articles on this topic. lems on patients [11–13]. Patients also experience low- There has been growing interest in psoriatic arthritis subject quality life [14–17] and there is also evidence of increased during these two decades. Between countries, institutions mortality among such patients [18, 19]. Scientometric study is a scientific ways to evaluate publications related to a special topic. Although their first A.-R. Jamshidi � F. Gharibdoost � A. Nadji use goes back to many years ago, they owe their wide- Department of Rheumatology, Rheumatology Research Center, spread use mainly to studies performed by Eugene Garfield Tehran University of Medical Sciences, Tehran, Iran in 1960s which finally resulted in the construction of Sci- M. Nikou � G. Habibi � A. Mardani � M. Ghaemi ( & ) ence Citation Index [20, 21]. Thereafter, these studies have Farzan Scientometric Group, Farzan Clinical Research Institute, earned special place in evaluating scientific productions Tehran, Iran [22] in different countries [23, 24], universities [25–27], e-mail: swt_f@yahoo.com 123
362 Rheumatol Int (2013) 33:361–367 journals [28] as well as publications related to a special The rest were meeting abstracts, review articles, letters, topic [29]. proceeding papers, and editorial materials. Notes, correc- Although there are many epidemiologic studies [7] and tions and news items separately covered less than 1 % of clinical reviews [8] on psoriatic arthritis [30, 31] and also literature mass. Exact frequencies and percents relating to scientometric studies investigating general topic arthritis, each item are presented in Table 1. quantitative description of publications on psoriatic arthritis specifically is lacking. So we aimed to perform this Trend of publications and citations scientometric study to evaluate articles published under topic ‘‘psoriatic arthritis’’ using ISI web of science. Maximum number of publications during one year is 208 (10.6 % of whole) in 2008 and 2009 which shows a 9.5- fold increase compared with years 1989 and 1990. There is Methods a sudden rise in number of published articles in 2002 which is followed by an obvious decline in two following years A bibliometric study was performed on the articles related to and another considerable rise in 2005. Figure 1 presents ‘‘Psoriatic arthritis’’ published between 1989 and 2009. The trend of publication during two studied decades. In con- ISIweb of science availableathttp://www.isiknowledge.com trast, number of citations to articles on this topic during was our main source. Two mesh terms—‘‘Psoriatic arthritis’’ these two decades shows a steady rise during time. and ‘‘Psoriatic arthropathy’’—already checked in Pubmed Figure 2 presents trend of citations to articles on the topic. mesh database—were used to conduct search. Our search formula was ‘‘TS = (Psoriatic arthritis) OR TS = (Psoriatic arthropathy) Databases = SCI - EXPANDED, SSCI, CPCI - S, Table 1 Frequency and percent of each article type published under psoriatic arthritis subject between 1989 and 2009 CPCI - SSH Timespan = 1990 - 2009’’. Original articles were subject of further evaluation. Article type Frequency (%) Extracted articles were evaluated regarding citation Article 1,961 (52.62) characteristics, contributing role of each author, country, Meeting abstract 881 (23.64) funding agency, institution, journal and language of pub- Review 381 (10.22) lished articles. Articles were also evaluated regarding trend Letter 210 (5.63) of publication and citation during time and also subject Proceedings paper 130 (3.49) areas which were published under. Editorial material 111 (2.98) Articles that were published in 10 countries with Note 35 (0.94) greatest number of publications on the topic were analyzed separately. Articles published by each country were eval- Correction 11 (0.29) News item 6 (0.16) uated regarding subject areas and publishing journals. Special attention was paid to total citations with and without self-citation, citation per year, citation per item for journals of each country. Articles that were cited more than 100 times were eval- uated regarding year of publication, country of affiliation of first author and publishing journal. Number, country, and year of collaborative studies came under focus in this part. Finally, level and type of collaboration between coun- tries was evaluated. Type of collaboration between coun- tries was analyzed using method developed by Kim [32]. IntColl software available at http://www.leydesdorff.net/ software/intcoll/intcoll.exe and Pajek software available at http://vlado.fmf.uni-lj.si/pub/networks/pajek/ were used for analysis and visual presentation of collaboration between countries. Results A whole number of 3,727 article was result of our search. Fig. 1 Trend of changes in number of publications from 1989 to From this number, 1,961 (52.6 %) were original articles. 2009 123
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