Valderrama Pilar, Escabias Manuel, Valderrama Mariano J, Jiménez-Contreras Evaristo, Baca Pilar
Vice Rectorate for Research and Transfer, University of Granada, 18071, Granada, Spain.
Department of Statistics and Operations Research, University of Granada, 18071, Granada, Spain.
Heliyon. 2020 Mar 18;6(3):e03575. doi: 10.1016/j.heliyon.2020.e03575. eCollection 2020 Mar.
The aim of this contribution is to determine what variables influence the position, by quartiles of the impact factor, as a quality indicator of a journal in the field of Dentistry.
To this end, 24 journals included in Journal Citation Reports, 6 pertaining to each quartile were selected by a stratified sampling and then an ordinal regression model was estimated stepwise considering the journal impact factor quartile as response variable.
The estimation procedure concluded that the average number of papers published yearly by a journal and the percentage of systematic reviews are the most significant variables to be considered, along with the factor representing the journal's degree of adherence to recommendations by the International Committee of Medical Journal Editors.
CONCLUSIONS/CLINICAL SIGNIFICANCE: Systematic reviews have significant effect on the Journal Impact Factor position of a journal as well as adherence to ICMJE recommendations, while papers publishing clinical trials bear no influence on this factor. Greater yearly average of published papers in a journal means a higher impact factor.
本研究旨在确定哪些变量会影响作为牙科领域期刊质量指标的影响因子四分位数排名。
为此，通过分层抽样从《期刊引证报告》中选取了24种期刊，每个四分位数包含6种期刊，然后逐步估计有序回归模型，将期刊影响因子四分位数作为响应变量。
估计程序得出结论，期刊每年发表的论文平均数量、系统评价的百分比是需要考虑的最显著变量，同时还包括代表期刊对医学期刊编辑国际委员会建议的遵守程度的因素。
结论/临床意义：系统评价对期刊的期刊影响因子排名以及对ICMJE建议的遵守情况有显著影响，而发表临床试验的论文对该因素没有影响。期刊每年发表的论文平均数量越多，影响因子越高。
