我国输精管缺如研究趋势及文献计量分析

目的探索国内关于输精管缺如研究的发展趋势及文献计量分析。方法应用CiteSpace对CNKI和Web of Science(WoS)数据库中所有输精管缺如相关文献进行文献计量分析,绘制科学知识图谱并分析输精管缺如研究领域的发展概况。结果检索到CNKI文献总数158篇,发文量最高的核心作者是周惠耕,共形成多个独立且分散的研究团队;研究成果最多的机构是宁波市妇女儿童医院与南京医科大学第一附属医院;“先天性双侧输精管缺如”、“基因突变”、“男性不育”等是高频关键词,关键词共现分析得到15个聚类标签。在WoS数据库中检索到55篇文献,发文量从1993年至今呈现逐渐增加趋势,每项文献平均引用次数15.69次。发文量最高的核心作者是Chan Hsiao Chang、阮晔纯、许文明团队,其次为李宏军团队和张炎团队。当前围绕囊性纤维化跨膜传导调节因子(CFTR)基因突变与输精管缺如关系而进行的染色体与基因水平的研究是热点方向。结论我国输精管缺如研究的数量和热度稳步发展;研究机构较多,但欠缺合作;研究维度从研究初期的临床病例报道发展为现在的基因与染色体水平;我国在该领域的研究在国际上得到广泛认可。     

近20年我国病案首页研究文献的可视化分析

选取中国知网（CNKI）数据库收录的1991-2015年有关病案首页研究的相关文献,利用社会网络分析法,对其核心作者及研究团队、年代分布、核心关键词及共现等进行分析,应用CiteSpaceⅢ对分析结果进行可视化展示,揭示我国病案首页研究关注的热点和发展趋势以及研究中存在的不足之处,为后续病案首页研究提供参考。     

我国分级诊疗认知实证调查研究现状的分析

目的了解我国分级诊疗认知实证调查研究的发展情况、趋势。方法以我国学者在CNKI、维普、万方中文期刊和毕业论文系统中发表的328篇文献为分析对象,利用文献计量分析、内容分析等方法对文献的数量、来源、作者及地域分布、基金支持、关键词等进行分析。结果分级诊疗认知调查发文数量增长明显,关注度不断加强;成果质量相对较高,基金支持较多;但是,核心作者群体尚未完全形成,不同地域关注度与研究水平仍有较大差异,研究内容仍有待深化。建议:持续加强对分级诊疗及其认知状况研究的支持,并逐步深化、扩展研究对象和内容,力争形成较好的认知研究队列。     

A bibliometric analysis of systematic reviews on vaccines and immunisation

IntroductionSYSVAC is an online bibliographic database of systematic reviews and systematic review protocols on vaccines and immunisation compiled by the London School of Hygiene & Tropical Medicine and hosted by the World Health Organization (WHO) through their National Immunization Technical Advisory Groups (NITAG) resource centre (www.nitag-resource.org). Here the development of the database and a bibliometric review of its content is presented, describing trends in the publication of policy-relevant systematic reviews on vaccines and immunisation from 2008 to 2016.Materials and methodsSearches were conducted in seven scientific databases according to a standardized search protocol, initially in 2014 with the most recent update in January 2017. Abstracts and titles were screened according to specific inclusion criteria. All included publications were coded into relevant categories based on a standardized protocol and subsequently analysed to look at trends in time, topic, area of focus, population and geographic location.ResultsAfter screening for inclusion criteria, 1285 systematic reviews were included in the database. While in 2008 there were only 34 systematic reviews on a vaccine-related topic, this increased to 322 in 2016. The most frequent pathogens/diseases studied were influenza, human papillomavirus and pneumococcus. There were several areas of duplication and overlap.DiscussionAs more systematic reviews are published it becomes increasingly time-consuming for decision-makers to identify relevant information among the ever-increasing volume available. The risk of duplication also increases, particularly given the current lack of coordination of systematic reviews on vaccine-related questions, both in terms of their commissioning and their execution. The SYSVAC database offers an accessible catalogue of vaccine-relevant systematic reviews with, where possible access or a link to the full-text.ConclusionsSYSVAC provides a freely searchable platform to identify existing vaccine-policy-relevant systematic reviews. Systematic reviews will need to be assessed adequately for each specific question and quality.     

Scaphoid fractures: A bibliometric analysis of the most influential papers

Scaphoid fractures are commonly seen following a fall on an outstretched hand and often missed on initial presentation. An untreated scaphoid fracture may result in avascular necrosis of the scaphoid due to its retrograde blood supply. Published articles guide our investigation and management of these injuries. A citation analysis was performed on the top 30 articles relating to scaphoid fractures ranked by citation number. The 30 articles have been cited a total of 4595 times originating from 9 different countries. The leading article was cited 443 times with an average of 12.66 citations/year. Although this may not directly correlate with study quality, it does provide an insight to the influence which a paper has had on the scientific community. This list may prove invaluable to clinicians involved in the treatment of patients with scaphoid fractures and those actively furthering the development of the field.     

Bibliometric analysis of publications on house dust mites during 1980–2018

BackgroundThe global prevalence of allergic diseases has increased dramatically in recent years and are now recognized as significant chronic diseases worldwide. One of the most important allergens that causes allergic diseases is house dust mites.ObjectiveThis study aims to present a bibliometric overview of research published on dust mites between 1980 and 2018.MethodsArticles published from 1980 to 2018 were analyzed using bibliometric methods. The keywords “Dust mite*,” and “Dermatophagoides” were used in the Web of Science (WoS). Simple linear regression analysis was used to estimate the number of future publications on this subject.ResultsA total of 4742 publications were found, 2552 (53.8%) of them were articles. Most of the articles were on subjects related to immunology (1274; 49.9%) and allergy (1229; 48.1%). Clinical and Experimental Allergy (222; 8.7%) was the journal with the most publications. The USA was the country that most contributed to the literature with 461 (18.1%) articles. The countries producing the most publications on this subject were developed countries. The most active author was W.R. Thomas (66; 2.5%). The most productive institution was the University of Western Australia (91; 3.6%). The most cited article was published in the New England Journal of Medicine.ConclusionAccording to the findings, developed countries were the most productive in publishing on house dust mites. By planning multinational research rather than regional studies, it may be suggested that researchers in underdeveloped or developing countries could also conduct more research on this subject.     

Gender differences in original Archivos de Bronconeumología publications, 2001-2018

IntroductionGender inequality exists in scientific publications. The aim of this study was to determine changing patterns in gender differences and factors associated with the positioning of authors’ names in original articles published in Archivos de Bronconeumología (AB).MethodsWe performed a bibliometric study of articles published in AB between 2001 and 2018. Author gender was analyzed in four scenarios: first author, last author, middle authors, and mentee authors. Comparisons were made by authors’ specialties, funding received, multicenter studies, specialist areas, and others. Multivariate models adjusted for the percentage of registered physicians in the Spanish health system were created to predict the female gender of the first, middle, and last author.ResultsA total of 828 publications were analyzed in which women appeared as first authors in 286 (34.5%) and last authors in 169 (20.4%). A gradual increase in women as first authors was observed (p = 0.0001), but not as last authors (p = 0.570). Overall, the average number of female authors increased over time (from 1.6 ± 1.4 in 2001?2005 to 3.3 ± 2.3 in 2016?2018, p = 0.0001), with no differences in male averages. The adjusted multivariate models reflected a positive bi-directional relationship between the first author and the middle authors, and a negative association between the first author being Spanish and the last author being female (OR 0.57; 95% CI 0.36?0.88, p = 0.012).ConclusionsGender differences were found in various aspects of authorship in AB, summarized by a greater participation of women as first and intermediate authors, but not as last authors.