Annalingam Anupama, Damayanthi Hasitha, Jayawardena Ranil, Ranasinghe Priyanga
Department of Pharmacology, Faculty of Medicine, University of Colombo, Colombo, Sri Lanka.
Institute of Health and Biomedical Innovation, Queensland University of Technology, Brisbane, Queensland Australia.
Springerplus. 2014 Mar 14;3:140. doi: 10.1186/2193-1801-3-140. eCollection 2014.
The number of citations received by an article is considered as an objective marker judging the importance and the quality of the research work. The present study aims to study the determinants of citations for research articles published by Sri Lankan authors.
Papers were selectively retrieved from the SciVerse Scopus® (Elsevier Properties S.A, USA) database for 10 years from 1st January 1997 to 31st December 2006, of which 50% were selected for inclusion by simple random sampling. The primary outcome measure was citation rate (defined as the number of citations during the 2 subsequent years after publication). Citation data was collected using the SciVerse Scopus® Citation Analyzer and self citations were excluded. A linear regression analysis was performed with 'number of citations' as the continuous dependent variable and other independent variables.
The number of publications has steadily increased during the period of study. Over three quarter of papers were published in international journals. More than half of publications were research studies (55.3%), and most of the research studies were descriptive cross-sectional studies (27.1%). The mean number of citations within 2 years of publication was 1.7 and 52.1% of papers were not cited within the first two years of publication. The mean number of citations for collaborative studies (2.74) was significantly higher than that of non-collaborative studies (0.66). The mean number of citations did not significantly change depending on whether the publication had a positive result (2.08) or not (2.92) and was also not influenced by the presence (2.30) or absence (1.99) of the main study conclusion in the title of the article. In the linear regression model, the journal rank, number of authors, conducting the study abroad, being a research study or systematic review/meta-analysis and having regional and/or international collaboration all significantly increased the number of citations.
The journal rank, number of authors, conducting the study abroad, being a research study or systematic review/meta-analysis and having regional and/or international collaboration all significantly increased the number of citations. However, the presence of a positive result in the study did not influence the citation rate.
一篇文章获得的引用次数被视为判断研究工作重要性和质量的客观指标。本研究旨在探讨斯里兰卡作者发表的研究论文被引用的决定因素。
从1997年1月1日至2006年12月31日的10年间，从SciVerse Scopus®（美国爱思唯尔集团）数据库中选择性检索论文，其中50%通过简单随机抽样选取纳入研究。主要结局指标是引用率（定义为发表后随后两年内的引用次数）。使用SciVerse Scopus®引用分析器收集引用数据，并排除自引。以“引用次数”作为连续因变量，其他变量作为自变量进行线性回归分析。
在研究期间，发表的论文数量稳步增加。超过四分之三的论文发表在国际期刊上。超过一半的发表物是研究性论文（55.3%），且大多数研究性论文是描述性横断面研究（27.1%）。发表后两年内的平均引用次数为1.7次，52.1%的论文在发表后的前两年内未被引用。合作研究的平均引用次数（2.74次）显著高于非合作研究（0.66次）。无论发表结果是否为阳性（2.08次），平均引用次数均无显著变化，文章标题中是否有主要研究结论（有：2.30次；无：1.99次）对其也无影响。在线性回归模型中，期刊排名、作者数量、在国外开展研究、是研究性论文或系统评价/荟萃分析以及有区域和/或国际合作均显著增加了引用次数。
期刊排名、作者数量、在国外开展研究、是研究性论文或系统评价/荟萃分析以及有区域和/或国际合作均显著增加了引用次数。然而，研究结果为阳性与否并不影响引用率。
