temporal trends in the impact factor of european versus usa biomedical journals时间趋势在欧洲和美国生物医学期刊的影响因子.pdf

Temporal Trends in the Impact Factor of European versus USA Biomedical Journals 1 1 1 1 Drosos E. Karageorgopoulos , Vasiliki Lamnatou , Thalia A. Sardi , Ioannis D. Gkegkes , Matthew E. Falagas1,2,3* 1 Alfa Institute of Biomedical Sciences (AIBS), Athens, Greece, 2 Department of Medicine, Henry Dunant Hospital, Athens, Greece, 3 Department of Medicine, Tufts University School of Medicine, Boston, Massachusetts, United States of America Abstract Background: The impact factors of biomedical journals tend to rise over time. We sought to assess the trend in the impact factor, during the past decade, of journals published on behalf of United States (US) and European scientific societies, in four select biomedical subject categories (Biology, Cell Biology, Critical Care Medicine, and Infectious Diseases). Methods: We identified all journals included in the above-mentioned subject categories of Thomson Reuters Journal Citation ReportsH for the years 1999, 2002, 2005, and 2008. We selected those that were published on behalf of US or European scientific societies, as documented in journal websites. Results: We included 167 journals (35 in the subject category of Biology, 79 in Cell Biology, 27 in Critical Care Medicine, and 26 in Infectious Diseases). Between 1999 and 2008, the percentage increase in the impact factor of the European journals was higher than for the US journals (73.76110.0% compared with 39.7670.0%, p = 0.049). Regarding specific subject categories, the percentage change in the factor of the European journals tended to be higher than the respective US journals for Cell Biology (61.7% versus 16.3%), Critical Care Medicine (212.4% versus 65.4%), Infectious Diseases (88.3% versus 48.7%), whereas