Texas Institute of Dermatology, 24165 W IH-10, Suite 102, San Antonio, TX 78257, USA.
Eur J Dermatol. 2011 Jul-Aug;21(4):495-500. doi: 10.1684/ejd.2011.1384.
The Institute for Scientific Information (ISI) defines substantive articles as source items, which include only research and review (R&R) articles. This policy encourages some Journals to publish a significant number of original reports in the category of letters to the editor and reviews in the category of Editorials. Consequently, the Impact Factor (IF) fails to provide a fair comparison between medical journals. We introduce a new value, the Comprehensive Citation Factor (CCF), which would include in the denominator all original reports and review articles. We reassessed the 2007 ISI IF rankings of 39 dermatology journals using the CCF formula. Along with research and review articles, research letters, editorials and case reports were also included in the denominator value. The CCF was calculated for each journal and then compared with the IF provided by the ISI for 2007. The rank orders of 27/39 journals (69%) were altered by two or more places bi-directionally. Journals with a significant number of editorial and/or letters had a lower CCF. Only 4 of the 39 journals (10%) kept the same rank when evaluated with the new CCF formula. The CCF is a more accurate quantitative representation to use for individual journal comparison. This formula would encourage editors to publish more manuscripts as original or review articles, rather letters or editorials, and eliminate the need for the controversial subjective classification.
科学信息研究所（ISI）将实质性文章定义为源项，其中仅包括研究和综述（R&R）文章。该政策鼓励一些期刊在编辑社论类别中发表大量原始报告和评论，在给编辑的信类别中发表。因此，影响因子（IF）未能在医学期刊之间提供公平的比较。我们引入了一个新的价值，即综合引文因子（CCF），它将在分母中包含所有原始报告和综述文章。我们使用 CCF 公式重新评估了 2007 年 ISI 对 39 种皮肤病学期刊的 IF 排名。除了研究和综述文章外，研究信函、社论和病例报告也包含在分母值中。为每个期刊计算 CCF，然后将其与 ISI 提供的 2007 年 IF 进行比较。27/39 种期刊（69%）的排名在两个方向上都改变了两个或更多的位置。编辑和/或信件数量较多的期刊 CCF 较低。使用新的 CCF 公式评估时，只有 39 种期刊中的 4 种（10%）保持相同的排名。CCF 是一种更准确的用于个体期刊比较的定量表示。该公式将鼓励编辑发表更多的原始或综述文章，而不是信件或社论，并消除对有争议的主观分类的需求。
