Editorial

We are pleased to announce that the CiteScore (CS) of the Polish Journal of Neurology and Neurosurgery (Neurologia i Neurochirurgia Polska) for 2017 increased, now registering at 0.96, and the Journal Impact Factor (IF) for 2017 remains very stable at 0.81. CS is ametric of citation impact of regularly published titles based upon analysis of Elsevier's Scopus database. There are 25,322 peer reviewed scientific titles (journals, books, conference proceedings) covered by Scopus. For comparison, Journal Citation Reports (source for calculating the IF) covers only a little over 11,000 titles. CS is a result of division of an average number of citations received by a title in a calendar year by the number of all papers published in a journal in the previous three years. CS values are available from 2011. The CS of the Polish Journal of Neurology and Neurosurgery (Neurologia i Neurochirurgia Polska) has increased throughout those years from 0.53 in 2011 to 0.96 in 2017 (Fig. 1, bars in blue), with a significant increase in comparison to 2016. IF has been calculated annually since 1975. Currently, the IF is published by Clarivate Analytics. The IF of a journal