美国和欧盟科学协会出版的生物医学期刊影响因子的时间趋势（1999 - 2015年）

Temporal Trends (1999-2015) in the Impact Factor of Biomedical Journals Published by US and EU Scientific Societies.

作者信息

Falagas Matthew E, Kyriakidou Margarita, Spais George, Argiti Efstathia, Vardakas Konstantinos Z

机构信息

Alfa Institute of Biomedical Sciences (AIBS), Athens, Greece.

Department of Medicine, Henry Dunant Hospital Center, Athens, Greece.

出版信息

Rambam Maimonides Med J. 2018 Apr 19;9(2):e0012. doi: 10.5041/RMMJ.10332.

DOI:10.5041/RMMJ.10332

PMID:29517962

原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC5916230/

Abstract

OBJECTIVE

The impact factor has emerged as the most popular index of scientific journals' resonance. In this study we aimed to examine the impact factor trends of journals published by scientific bodies in the United States of America (USA) and Europe (EU).

METHODS

We randomly chose 11 categories of Journal of Citation Reports and created three research classes: clinical medicine, laboratory medicine, and basic science. The impact factor values for the years 1999-2015 were abstracted, and the impact factor of US and EU journals was studied through the years.

RESULTS

A total of 265 journals were included in the final analysis. The impact factor of US journals was higher than that of EU journals throughout the study period. In addition, for both US and EU journals the median impact factor increased throughout the study period. The rate of annual change in the impact factor throughout the study period was lower for US than EU journals (1.85% versus 3.55%, P=0.019). A higher median annual increase was seen in the impact factor during the period 1999-2008 compared to the period 2009-2015 for both US (P<0.001) and EU (P=0.001) journals. In fact, during the second period the US median impact factor value did not show significant changes (P=0.31), while the EU median impact factor continued to increase (P<0.001).

CONCLUSION

The impact factor of EU journals increased at a significantly higher rate than and approached that of the US journals during the last 16 years.

摘要

目的

影响因子已成为科学期刊影响力最常用的指标。在本研究中，我们旨在考察美国和欧洲科学机构出版期刊的影响因子趋势。

方法

我们随机选取了11类《期刊引证报告》，并创建了三个研究类别：临床医学、检验医学和基础科学。提取了1999 - 2015年的影响因子值，并对这些年美国和欧洲期刊的影响因子进行了研究。

结果

最终分析共纳入265种期刊。在整个研究期间，美国期刊的影响因子高于欧洲期刊。此外，美国和欧洲期刊的影响因子中位数在整个研究期间均有所增加。在整个研究期间，美国期刊影响因子的年变化率低于欧洲期刊（1.85%对3.55%，P = 0.019）。与2009 - 2015年相比，1999 - 2008年期间美国（P < 0.001）和欧洲（P = 0.001）期刊的影响因子年中位数增幅更高。事实上，在第二个时期，美国影响因子中位数未显示出显著变化（P = 0.31），而欧洲影响因子中位数持续增加（P < 0.001）。