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首页> 外文期刊>Klinische Paediatrie >Rating and ranking of medical journals: A randomised controlled evaluation of impact factor and number of listed journals [Rating und Ranking medizinischer Zeitschriften: Randomisiert kontrollierte Evaluation von Impact Factor und Zahl der gelisteten Journale]
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Rating and ranking of medical journals: A randomised controlled evaluation of impact factor and number of listed journals [Rating und Ranking medizinischer Zeitschriften: Randomisiert kontrollierte Evaluation von Impact Factor und Zahl der gelisteten Journale]

机译：医学期刊的评级和排名：影响因子和上市期刊数量的随机对照评估[医学期刊的评级和排名：影响因子和上市期刊数量的随机对照评估]

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Background: The impact factor is a purely bibliometric parameter built on a number of publications and their citations that occur within clearly defined periods. Appropriate interpretation of the impact factor is important as it is also used worldwide for the evaluation of research performance. Research question: It is assumed that the number of medical journals reflects the extent of diseases and patient populations involved and that the number is correlated with the level of the impact factor. Method: 174 category lists (Subject Categories) are included in the area Health Sciences of the ISI Web of Knowledge of Thomson Reuters, 71 of which belong to the field of medicine and 50 of which have a clinical and/or application-oriented focus. These alphabetically arranged 50 category lists were consecutively numbered, randomized by odd and even numbers, respectively, into 2 equal-sized groups and then grouped according to organ specialities, sub-specialities and cross-disciplinary fields. By tossing up a coin it was decided which group should be evaluated first. Only then the category lists were downloaded and the number of journals, as well as the impact factors of journals ranking number 1 and 2, as well as the impact factors of journals at the end of the first third and at the end of the first half of each category list were compared. Results: The number of journals per category list varies considerably between 5 and 252. The lists of organ specialties and cross-disciplinary fields include more than three times as many journals as those of the sub-specialities; the highest numbers of journals are listed for the cross-disciplinary fields. The level of impact factor of journals that rank number 1 in the lists varies considerably and ranges from 3,058 to 94,333; a similar variability exists for the journals at rank 2. On the other hand, the impact factor of journals at the end of the first third of the lists varies from 1,214 and 3,953, and for those journals at the end of the first half of a respective category list it varies from 0,609 and 2,872. The slope of the straight correlation line between the level of impact factors of journals at rank 1 and 2 with the number of listed journals varies from 0,0756 and 0,2651 (correlation coefficients between 0,49 and 0,96). For the journals ranking further down in the lists the straight correlation lines run almost horizontally or with inverse slope. Conclusions: This current analysis adds to the knowledge for an appropriate interpretation of the impact factor. Generally, greater importance should be given to the ranking of a journal within a corresponding category list.
机译：背景：影响因子是建立在明确定义期间内的大量出版物及其引用的纯文献计量参数上。对影响因素的适当解释很重要，因为它在全世界也用于评估研究绩效。研究问题：假设医学期刊的数量反映出所涉及疾病和患者人群的程度，并且该数量与影响因子的水平相关。方法：汤森路透的ISI知识网的卫生科学领域包括174个类别列表（主题类别），其中71个属于医学领域，其中50个具有临床和/或应用导向的重点。这些按字母顺序排列的50个类别列表被连续编号，分别按奇数和偶数随机分为2个大小相等的组，然后根据器官专业，子专业和跨学科领域进行分组。通过掷硬币，决定了应该首先评估哪个组。然后才下载类别列表，期刊数量，排名第1和第2的期刊的影响因子，以及在前三分之一末和上半年末期刊的影响因子比较每个类别列表。结果：每个类别列表中的期刊数量在5到252之间变化很大。器官专业和跨学科领域的列表所包含的期刊数量是子专业期刊的三倍多;跨学科领域的期刊数量最多。排名第一的期刊的影响因子水平差异很大，范围从3,058到94,333;排名第2的期刊也存在类似的变异性。另一方面，排名前三分之一的期刊的影响因子从1,214和3,953不等，而对于排名第一的期刊的影响因子则为相应的类别列表从0,609和2,872不等。排名1和2的期刊的影响因子水平与列出期刊的数目之间的直线相关线的斜率在0756和02651之间变化（相关系数在0.49和0.96之间）。对于在列表中排名靠后的期刊，直线相关线几乎水平或呈反斜率。结论：当前的分析增加了对影响因素的适当解释的知识。通常，应更加重视相应类别列表中期刊的排名。

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