Department of Radiology, Nuclear Medicine, and Molecular Imaging, University Medical Center Groningen, University of Groningen, Groningen, The Netherlands.
Department of Radiology and Nuclear Medicine, Zuyderland Medical Center, Henri Dunantstraat 5, 6419 PC Heerlen, The Netherlands.
AJR Am J Roentgenol. 2020 Nov;215(5):1286-1289. doi: 10.2214/AJR.20.22786. Epub 2020 Sep 2.
The purpose of this study is to investigate the frequency of funded research published in major radiology journals and to determine whether funding is associated with the article citation rate. A total of 600 consecutive original research articles published in three journals-, , and -were included. Linear regression analysis was performed to determine the association between research funding and the article citation rate, as adjusted for journal, continent of origin of the first author, subspecialty, study findings included in the article title, number of authors, immediate open access publication, and time since publication online. Funding was declared for 286 of 600 included articles (47.7%). Sources of funding were as follows: federal sponsorship (29.4%), a nonprofit foundation (16.4%), both federal sponsorship and a nonprofit foundation (16.1%), private industry (10.1%), intramural institutional research funding (9.8%), and other funding sources (18.2%). Articles with first authors whose continent of origin was Europe ( < 0.001), vascular and interventional radiology articles ( < 0.001), and articles published in ( < 0.001) were significantly more frequently unfunded than funded. Articles published in were significantly more frequently funded ( < 0.001). The citation rate was not significantly different between funded and unfunded articles ( = 0.166). In adjusted linear regression analysis, funding was not significantly associated with the citation rate (β coefficient, -0.31; 95% CI, -3.27 to 2.66; = 0.838). Almost half of the research articles published in major radiology journals declared funding, a proportion that has increased compared with findings from previous studies (17% of articles in a study from 1994 and 26.9% of articles in a study of literature published between 2001 and 2010). Most funded articles received support from federal sponsors or nonprofit foundations, whereas only a minority of funded articles were supported by private industry. Funding was not associated with a higher citation rate.
本研究旨在调查主要放射学期刊上发表的有资助研究的频率，并确定资助是否与文章引用率相关。共纳入三本刊的连续 600 篇原始研究文章，分别为-、-和-。线性回归分析用于确定研究资助与文章引用率之间的关联，调整了期刊、第一作者所在洲、亚专科、文章标题中包含的研究结果、作者数量、即时开放获取出版和在线发表后时间。600 篇纳入文章中有 286 篇（47.7%）宣布了资助情况。资助来源如下：联邦资助（29.4%）、非营利基金会（16.4%）、联邦资助和非营利基金会（16.1%）、私营企业（10.1%）、机构内部研究资助（9.8%）和其他资金来源（18.2%）。第一作者所在洲为欧洲的文章（<0.001）、血管和介入放射学文章（<0.001）和发表在-的文章（<0.001）比有资助的文章更频繁地未获得资助。发表在-的文章更频繁地获得资助（<0.001）。有资助和无资助文章的引用率无显著差异（=0.166）。在调整后的线性回归分析中，资助与引用率无显著关联（β系数，-0.31；95%CI，-3.27 至 2.66；=0.838）。主要放射学期刊上发表的研究文章中，有近一半宣布了资助，这一比例与之前的研究结果相比有所增加（1994 年一项研究中的文章占 17%，2001 年至 2010 年文献研究中的文章占 26.9%）。大多数有资助的文章得到了联邦资助者或非营利基金会的支持，而只有少数有资助的文章得到了私营企业的支持。资助与更高的引用率无关。
