Department of Neurosurgery.
J Neurosurg. 2014 Mar;120(3):746-55. doi: 10.3171/2013.11.JNS131708. Epub 2013 Dec 20.
Bibliometrics is defined as the study of statistical and mathematical methods used to quantitatively analyze scientific literature. The application of bibliometrics in neurosurgery is in its infancy. The authors calculate a number of publication productivity measures for almost all academic neurosurgeons and departments within the US.
The h-index, g-index, m-quotient, and contemporary h-index (hc-index) were calculated for 1225 academic neurosurgeons in 99 (of 101) programs listed by the Accreditation Council for Graduate Medical Education in January 2013. Three currently available citation databases were used: Google Scholar, Scopus, and Web of Science. Bibliometric profiles were created for each surgeon. Comparisons based on academic rank (that is, chairperson, professor, associate, assistant, and instructor), sex, and subspecialties were performed. Departments were ranked based on the summation of individual faculty h-indices. Calculations were carried out from January to February 2013.
The median h-index, g-index, hc-index, and m-quotient were 11, 20, 8, and 0.62, respectively. All indices demonstrated a positive relationship with increasing academic rank (p < 0.001). The median h-index was 11 for males (n = 1144) and 8 for females (n = 81). The h-index, g-index and hc-index significantly varied by sex (p < 0.001). However, when corrected for academic rank, this difference was no longer significant. There was no difference in the m-quotient by sex. Neurosurgeons with subspecialties in functional/epilepsy, peripheral nerve, radiosurgery, neuro-oncology/skull base, and vascular have the highest median h-indices; general, pediatric, and spine neurosurgeons have the lowest median h-indices. By summing the manually calculated Scopus h-indices of all individuals within a department, the top 5 programs for publication productivity are University of California, San Francisco; Barrow Neurological Institute; Johns Hopkins University; University of Pittsburgh; and University of California, Los Angeles.
This study represents the most detailed publication analysis of academic neurosurgeons and their programs to date. The results for the metrics presented should be viewed as benchmarks for comparison purposes. It is our hope that organized neurosurgery will adopt and continue to refine bibliometric profiling of individuals and departments.
文献计量学被定义为用于定量分析科学文献的统计和数学方法的研究。文献计量学在神经外科学中的应用还处于起步阶段。作者计算了美国 99 个（101 个中）被研究生医学教育认证委员会（Accreditation Council for Graduate Medical Education）列出的学术神经外科项目中几乎所有学术神经外科医生和部门的一些出版生产力指标。
计算了 2013 年 1 月被研究生医学教育认证委员会列出的 1225 名学术神经外科医生的 h 指数、g 指数、m 商和当代 h 指数（hc-index）。使用了三种当前可用的引文数据库：谷歌学术、Scopus 和 Web of Science。为每位外科医生创建了文献计量学档案。根据学术级别（即主席、教授、副教授、助理教授和讲师）、性别和亚专业进行了比较。根据个别教员 h 指数的总和对部门进行了排名。计算于 2013 年 1 月至 2 月进行。
中位数 h 指数、g 指数、hc-index 和 m 商分别为 11、20、8 和 0.62。所有指数都与学术等级的增加呈正相关（p<0.001）。男性（n=1144）的中位数 h 指数为 11，女性（n=81）的中位数 h 指数为 8。h 指数、g 指数和 hc-index 因性别而异（p<0.001）。然而，当按学术等级校正时，这种差异不再显著。性别的 m 商没有差异。功能/癫痫、周围神经、放射外科、神经肿瘤/颅底和血管神经外科的神经外科医生的中位数 h 指数最高；普通、儿科和脊柱神经外科医生的中位数 h 指数最低。通过对每个部门内所有个体的手动计算 Scopus h 指数求和，发表生产力排名前 5 的项目是加利福尼亚大学旧金山分校、巴罗神经学研究所、约翰霍普金斯大学、匹兹堡大学和加利福尼亚大学洛杉矶分校。
这是迄今为止对学术神经外科医生及其项目进行的最详细的出版分析。对于所呈现的指标，其结果应被视为比较的基准。我们希望神经外科学组织能够采用并继续完善个人和部门的文献计量学档案。
