title: Use of H-Index and Other Bibliometric Indicators to Evaluate Research Productivity Outcome on Swine Diseases.
abstract: H-index is the most commonly applied tool to evaluate scientific productivity. In this study, the use of the H-index to evaluate scientific production in swine veterinary medicine was explored. A database of 137 pig infectious agents was constructed, including its taxonomic division, zoonotic potential, status as emerging pathogen and whether it was OIE-listed. The H-index and the total number of citations were calculated for those pathogens, the location of the affiliation of the first author of each paper included in the H-index core was registered and, for the ten pathogens with the highest H-index, evolution over time was measured. H-index values were compared to the M quotient, A-index, G-index, HG-index and the G/H ratio. H-indices were found to be severely affected by search accuracy and the database was hand curated. Swine pathogen H-indexes were highly dispersed ranging from 0 to 106 and were generally higher for pathogens causing endemic diseases in large pig producing countries. Indeed, the three top pathogens were Escherichia coli, Porcine reproductive and respiratory syndrome virus and Porcine circovirus type 2 with H-indices 106, 95 and 85, respectively. H-indices of viruses and bacteria were significantly higher (P<0.001) than other pathogen types. Also, non-zoonotic pathogens had higher H-indices than zoonotic pathogens (p<0.009) while no differences could be found for being listed by the OIE. For emerging diseases, only non-emerging viruses had higher H-index (p = 0.02). The study of H-indexes over time revealed three general patterns and that they had increased mainly after the 1980's. As expected, there were strong geographic patterns in terms of authorship and North America (38%) and Europe (46%) coped the majority of the papers. Finally, in order to quantify the contribution of a subject to a specific field, a new index "Deciphering Citations Organized by Subject" (Dcos) is proposed.
authors.affiliation: IRTA, Centre de Recerca en Sanitat Animal (CReSA, IRTA-UAB), Campus de la Universitat Autònoma de Barcelona, 08193 Bellaterra, Barcelona, Spain.
authors.forename: Ivan
authors.initials: I
authors.lastname: Díaz
authors.affiliation: IRTA, Centre de Recerca en Sanitat Animal (CReSA, IRTA-UAB), Campus de la Universitat Autònoma de Barcelona, 08193 Bellaterra, Barcelona, Spain.
authors.forename: Martí
authors.initials: M
authors.lastname: Cortey
authors.affiliation: Institut de Recerca de la Sida, IrsiCaixa-HIVACAT, Carretera del Canyet, s/n, 08916 Badalona, Spain.
authors.forename: Àlex
authors.initials: À
authors.lastname: Olvera
authors.affiliation: UAB, Centre de Recerca en Sanitat Animal (CReSA, IRTA-UAB), Campus de la Universitat Autònoma de Barcelona, 08193 Bellaterra, Barcelona, Spain.|Departament de Sanitat i d'Anatomia Animals, Universitat Autònoma de Barcelona, 08193 Bellaterra (Cerdanyola del Vallès), Spain.
authors.forename: Joaquim
authors.initials: J
authors.lastname: Segalés
mesh_terms: D000818:Animals; D005060:Europe / Q000453:epidemiology; D006801:Humans; D055811:Journal Impact Factor; D063369:Knowledge Discovery / Q000379:methods*; D009656:North America / Q000453:epidemiology; D013552:Swine; D013553:Swine Diseases / Q000453:epidemiology* / Q000382:microbiology / Q000821:virology; D014730:Veterinary Medicine / Q000706:statistics & numerical data*; D015047:Zoonoses / Q000453:epidemiology / Q000382:microbiology / Q000821:virology