Inflated numbers of authors over time have not been just due to increasing research complexity
Inflated numbers of authors over time have not been just due to increasing research complexity
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DOI：
10.1016/j.jclinepi.2007.07.017
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发表时间：
2008-06-01
影响因子：
7.2
通讯作者：
Ioannidis, John P. A.
中科院分区：
文献类型：
--
作者：
Papatheodorou, Stefania I.;Trikalinos, Thomas A.;Ioannidis, John P. A.
目的：研究设计和设置：我们分析了随机试验的633篇文章和313篇非随机研究的大型荟萃分析（7和6个主题，分别）中的作者数量的决定因素。根据主题调整分析。我们还评估了310例随机抽样的病例报告，有一个摘要，并描述了一个单一的case.Results：调整主题和其他决定因素后，随机试验和非随机研究，作者人数增加了0.8每十年（P < 0.001）。主题是作者数量的重要决定因素;其他独立因素包括期刊影响因子、跨国作者和（随机试验）文章长度和样本量。来自南欧（+1.1作者）和北美（+0.9）的试验和来自南欧（+1.8）的非随机研究的作者多于来自北欧的研究（P < 0.001）。对于病例报告，只有地理位置和文章长度与作者数量显着相关。结论：随机和非随机研究文章的作者数量随着时间的推移而增加，即使在调整研究的主题、规模和知名度后也是如此。学术界对作者的信任可能正在受到通货膨胀的影响。(c)2008年爱思唯尔公司All rights reserved.
Objective: To examine trends in and determinants of the number of authors in clinical studies.Study Design and Setting: We analyzed determinants of the number of authors in 633 articles of randomized trials and 313 articles of nonrandomized studies included in large meta-analyses (seven and six topics, respectively). Analyses were adjusted for topic. We also evaluated 310 randomly sampled case reports that had an abstract and described a single case.Results: After adjusting for topic and other determinants, for both randomized trials and nonrandomized studies, the number of authors increased by 0.8 per decade (P < 0.001). Topic was a strong determinant of the number of authors; other independent factors included journal impact factor, multinational authorship, and (for randomized trials) article length and sample size. Trials from South Europe (+1.1 authors) and North America (+0.9) and nonrandomized studies from South Europe (+1.8) had more authors than studies from North Europe (P < 0.001). For case reports, only geographic location and article length were significantly related with author numbers.Conclusion: The number of authors in articles of randomized and nonrandomized studies has increased over time, even after adjusting for the topic, size, and visibility of a study. The academic coinage of authorship may be suffering from inflation. (c) 2008 Elsevier Inc. All rights reserved.