Azer Samy A, Azer Sarah
College of Medicine, King Saud University, Riyadh, Saudi Arabia.
St Vincent Hospital, University of Melbourne, Melbourne, Victoria, Australia.
BMJ Open. 2018 Jul 12;8(7):e021233. doi: 10.1136/bmjopen-2017-021233.
Despite increasing number of publications in inflammatory bowel disease (IBD), no bibliometric analysis has been conducted to evaluate the significance of highly cited articles. Our objectives were to identify the top-cited articles in IBD, assessing their characteristics and determining the quality of evidence provided by these articles.
IBD and related terms were used in searching the Web of Science to identify English language articles. The 50 top-cited articles were analysed by year, journal impact factor (JIF), authorship, females in authorship, institute, country and grants received. The level of evidence was determined using the Oxford Centre for Evidence-Based Medicine guidelines.
The number of citations varied from 871 to 3555 with a total of 74 638, and a median 1339.50 (IQR=587). No correlations were found between the number of citations and number of years since publication (r=0.042, p=0.771), JIF (r=0.186, p=0.196), number of authors (r=0.061, p=0.674), females in authorship (r=0.064, p=0.661), number of institutes (r=0.076, p=0.602), number of countries (r=0.101, p=0.483) or number of grants (r=-0.015, p=0.915). The first authors were from the USA (n=24), the UK (n=6), Germany (n=5), France (n=5), Belgium (n=3) and Canada (n=3). The levels of evidence were 12 articles at level 1b, 9 articles at level 3a and 15 articles at level 3b and fewer were at other levels.
Research papers represented 66% of articles. The majority of items have reasonably high levels of evidence, which may have contributed to the higher number of citations. The study also shows a gender gap in authorship in this area.
尽管关于炎症性肠病（IBD）的出版物数量不断增加，但尚未进行文献计量分析来评估高被引文章的重要性。我们的目的是识别IBD领域的高被引文章，评估其特征并确定这些文章所提供证据的质量。
使用IBD及相关术语在科学网中搜索英文文章。对50篇高被引文章按年份、期刊影响因子（JIF）、作者身份、作者中的女性比例、机构、国家和获得的资助进行分析。使用牛津循证医学中心指南确定证据水平。
文章的被引次数从871次到3555次不等，总计74638次，中位数为1339.50（四分位间距=587）。未发现被引次数与发表年份数（r=0.042，p=0.771）、JIF（r=0.186，p=0.196）、作者数量（r=0.061，p=0.674）、作者中的女性比例（r=0.064，p=0.661）、机构数量（r=0.076，p=0.602）、国家数量（r=0.101，p=0.483）或资助数量（r=-0.015，p=0.915）之间存在相关性。第一作者来自美国（n=24）、英国（n=6）、德国（n=5）、法国（n=5）比利时（n=3）和加拿大（n=3）。证据水平为1b级的文章有12篇，3a级的文章有9篇，3b级的文章有15篇，其他水平的文章较少。
研究论文占文章总数的66%。大多数文章具有相当高的证据水平，这可能是被引次数较多的原因。该研究还显示了该领域作者身份方面的性别差异。
