Department of Obstetrics, Gynecology and Reproductive Sciences, Rutgers Robert Wood Johnson Medical School, New Brunswick, NJ.
Division of Epidemiology and Biostatistics, Department of Obstetrics, Gynecology and Reproductive Sciences, Rutgers Robert Wood Johnson Medical School, New Brunswick, NJ; Department of Biostatistics and Epidemiology, Rutgers School of Public Health, Piscataway, NJ; Cardiovascular Institute of New Jersey, Rutgers Robert Wood Johnson Medical School, New Brunswick, NJ; Environmental and Occupational Health Sciences Institute, Rutgers Robert Wood Johnson Medical School, New Brunswick, NJ.
Am J Obstet Gynecol MFM. 2021 Jan;3(1):100293. doi: 10.1016/j.ajogmf.2020.100293. Epub 2020 Dec 11.
The Relative Citation Ratio is a novel bibliometric tool that quantifies the impact of research articles. The objectives of this study were to identify the 100 obstetrics and gynecology articles with the highest relative citation ratios, evaluate how characteristics of these articles changed over time, and compare characteristics of these articles with top-cited obstetrics and gynecology articles.
We undertook a cross-sectional bibliometric study to examine the 100 obstetrics and gynecology articles with the highest relative citation ratios and the top 100 cited articles in the National Institutes of Health Open Citations Collection from 1980 to 2019.
We identified every obstetrics and gynecology article published from 1980 to 2019 that was indexed in the National Institutes of Health Open Citations Collection. The top 100 articles with the highest relative citation ratios and the top 100 cited articles were selected for further review. Each article was evaluated using metrics of influence, translation, and other characteristics. We compared the top 100 articles with the highest relative citation ratios published from 1980 to 1999 versus 2000 to 2019 and characteristics of the top 100 articles with the highest relative citation ratios versus the top 100 top-cited articles (after excluding those on both lists). Means, standard deviations, and mean differences with corresponding 95% confidence intervals were calculated. Associations were expressed as relative risks (95% confidence interval).
A total of 323,673 obstetrics and gynecology articles were published between 1980 and 2019. Among the top 100 articles with the highest relative citation ratios, most were observational studies (36%), reviews (26%), and consensus statements (21%). There were only 5 randomized clinical trials. Compared with the articles with the highest relative citation ratios published from 1980 to 1999, articles published from 2000 to 2019 were more likely about benign gynecology (relative risks, 1.3; 95% confidence interval, 0.6-2.8) and less likely about gynecology-oncology (relative risks, 0.6; 95% confidence interval, 0.2-1.9) and urogynecology (relative risks, 0.6; 95% confidence interval, 0.1-3.3). The articles after 2000 were more likely about systematic reviews (relative risks, 7.7; 95% confidence interval, 1.0-58.3) and consensus statements (relative risks, 5.1; 95% confidence intervals, 1.6-16.3) and were published as open access articles (relative risks, 1.3; 95% confidence interval, 0.9-2.0). There were 60 articles in common between the top 100 articles with the highest relative citation ratios and the top 100 cited articles. Compared with articles that were top cited (after excluding articles on both lists), articles with the highest relative citation ratios received fewer mean citations (266.9 [135.3] vs 514.3 [54.6]; mean differences, 247.4; 95% confidence interval, 201.5-293.3) but had higher numbers of citations per year (37.5 [4.1] vs 31.6 [8.1]; mean difference, -5.9; 95% confidence interval, -14.6 to -2.7). Compared with the articles with the highest relative citation ratios, top-cited articles were more likely to address gynecology topics (relative risk, 1.6; 95% confidence interval, 1.1-2.5), less likely to be randomized clinical trials (relative risk, 0.7; 95% confidence interval, 0.1-3.8), and less likely to be published as open access articles (relative risk, 0.52; 95% confidence interval, 0.31-0.86).
The Relative Citation Ratio is a novel bibliometric tool that does not rely on absolute citation rates and provides unique insight into the dissemination of knowledge in obstetrics and gynecology. Nearly half of the influential obstetrics and gynecology articles identified with this metric would not have been recognized as citation classics by conventional bibliometric analysis.
相对引文比是一种新的文献计量工具，用于量化研究文章的影响力。本研究的目的是确定妇产科领域 100 篇相对引文比最高的文章，评估这些文章的特征随时间的变化，并比较这些文章与妇产科高被引文章的特征。
我们进行了一项横断面文献计量学研究，以检查从 1980 年到 2019 年在国立卫生研究院公开引文集中发表的妇产科领域中相对引文比最高的 100 篇文章和排名前 100 的文章。
我们确定了 1980 年至 2019 年在国立卫生研究院公开引文集中索引的每一篇妇产科文章。选择排名前 100 的相对引文比最高的文章和排名前 100 的高被引文章进行进一步的审查。使用影响力、翻译和其他特征的指标来评估每篇文章。我们比较了 1980 年至 1999 年和 2000 年至 2019 年发表的相对引文比最高的前 100 篇文章的特征，以及相对引文比最高的前 100 篇文章与排名前 100 的高被引文章的特征（排除了这两个列表中的文章）。计算了平均值、标准差和均值差异及其对应的 95%置信区间。关联用相对风险（95%置信区间）表示。
1980 年至 2019 年期间共发表了 323673 篇妇产科文章。在相对引文比最高的前 100 篇文章中，大多数是观察性研究（36%）、综述（26%）和共识声明（21%）。只有 5 项随机临床试验。与 1980 年至 1999 年发表的相对引文比最高的文章相比，2000 年至 2019 年发表的文章更可能是良性妇科疾病（相对风险，1.3；95%置信区间，0.6-2.8），不太可能是妇科肿瘤学（相对风险，0.6；95%置信区间，0.2-1.9）和尿妇科（相对风险，0.6；95%置信区间，0.1-3.3）。2000 年后发表的文章更可能是系统评价（相对风险，7.7；95%置信区间，1.0-58.3）和共识声明（相对风险，5.1；95%置信区间，1.6-16.3），并且更有可能是开放获取文章（相对风险，1.3；95%置信区间，0.9-2.0）。在相对引文比最高的前 100 篇文章和前 100 篇高被引文章中有 60 篇文章是共同的。与排名靠前的文章（排除了这两个列表中的文章）相比，相对引文比最高的文章的平均引用次数较少（266.9 [135.3] vs 514.3 [54.6]；平均值差异，247.4；95%置信区间，201.5-293.3），但每年的引用次数较多（37.5 [4.1] vs 31.6 [8.1]；平均值差异，-5.9；95%置信区间，-14.6 至-2.7）。与相对引文比最高的文章相比，高被引文章更有可能涉及妇科主题（相对风险，1.6；95%置信区间，1.1-2.5），不太可能是随机临床试验（相对风险，0.7；95%置信区间，0.1-3.8），不太可能是开放获取文章（相对风险，0.52；95%置信区间，0.31-0.86）。
相对引文比是一种新的文献计量工具，不依赖于绝对引文率，为我们提供了妇产科领域知识传播的独特视角。通过这种计量方法确定的近一半有影响力的妇产科文章，如果用传统的文献计量分析方法，可能不会被认为是引文经典。
