Hansen H B, Brinch K, Henriksen J H
Department of Clinical Physiology and Nuclear Medicine, Hvidovre Hospital, Denmark.
Clin Physiol. 1996 Sep;16(5):507-19. doi: 10.1111/j.1475-097x.1996.tb01016.x.
This study reports a bibliometric analysis of scientific publications emanating from departments of clinical physiology and nuclear medicine, Denmark, during the years 1989-1994. The total number of publications during this period was 860 (763 scientific journal papers, 71 book/book chapters and 26 theses). Whereas the number of publications per year (188-113) decreased significantly with time (r = -0.94, P < 0.02), the number of authors (mean 4.1) was almost constant over time. University/ university-related departments accounted for 96% of the papers. Only 8% of the papers resulted from a collaboration between two or more departments of clinical physiology and nuclear medicine, but the collaboration with other medical specialities and institutions was much greater (85%). The 763 papers were published in 239 different scientific journals, 80% in journals with an official 'impact factor', a bibliometric measure of quality (the average number of times a paper is cited in a journal in the publishing year and the subsequent year). Twenty per cent (20%) and 8.4% were printed in journals with an impact factor, respectively, of above 2.1 (the 500 journals most cited) and 3.7 (the 200 most cited), which is significantly above the national average 16.6% and 6.0%, P < 0.001). The "cumulated impact' (i.e. the impact of all papers) showed a borderline significant decrease over time (r = -0.77, P = 0.1), whereas the average impact per paper (1.53) remained almost constant and was significantly above the national average (1.10, P < 0.001). A close relationship was found between the number of papers from a department and its cumulated impact (r = -0.97, P < 0.001). It is concluded that the total number of scientific papers from Danish departments of clinical physiology and nuclear medicine fell in the period, whereas the volume of quality, as assessed on the cumulated impact, only fell with borderline significance, and the impact per paper was almost constant from 1989 to 1994, and was above the national average.
本研究报告了1989年至1994年间丹麦临床生理学和核医学系发表的科学文献的文献计量分析。在此期间发表的文献总数为860篇（763篇科学期刊论文、71篇书籍/书籍章节和26篇论文）。虽然每年的文献数量（188 - 113篇）随时间显著减少（r = -0.94，P < 0.02），但作者数量（平均4.1人）随时间几乎保持不变。大学/与大学相关的系占论文的96%。只有8%的论文来自临床生理学和核医学的两个或更多系之间的合作，但与其他医学专科和机构的合作要多得多（85%）。这763篇论文发表在239种不同的科学期刊上，80%发表在具有官方“影响因子”的期刊上，影响因子是衡量质量的文献计量指标（一篇论文在发表年份及随后一年在期刊中被引用的平均次数）。分别有20%和8.4%发表在影响因子高于2.1（被引用次数最多的500种期刊）和3.7（被引用次数最多的200种期刊）的期刊上，这显著高于全国平均水平16.6%和6.0%，P < 0.001）。“累积影响”（即所有论文的影响）随时间呈临界显著下降（r = -0.77，P = 0.1），而每篇论文的平均影响（1.53）几乎保持不变，且显著高于全国平均水平（1.10，P < 0.001）。发现一个系的论文数量与其累积影响之间存在密切关系（r = -0.97，P < 0.001）。得出的结论是，丹麦临床生理学和核医学系的科学论文总数在此期间有所下降，而以累积影响评估的质量仅呈临界显著下降，1989年至1994年间每篇论文的影响几乎保持不变，且高于全国平均水平。
