• Ryan P Lee, Garrett T Venable, Mallory L Roberts, Kara A Parikh, Douglas R Taylor, Nickalus R Khan, L Madison Michael, and Paul Klimo.
• College of Medicine, University of Tennessee Health Science Center, Memphis, Tennessee, USA.
• World Neurosurg. 2016 Nov 1; 95: 565-575.

BackgroundWe recently performed a comprehensive bibliometric analysis of 103 U.S. neurosurgical departments and found the ih(5)-index as meaningful and reproducible using public data. The present report expands this analysis by adding 14 Canadian and 2 additional U.S. programs.MethodsDepartments were included if listed in the American Association of Neurological Surgeons Residency Directory. Each institution was considered a single entity, and original research articles with authors who were neurosurgeon faculty were counted only once per institution, although a single article may have been credited toward multiple institutions, if applicable. The following bibliometric indices were calculated and used to rank departments: ih(5), ig(5), ie(5), and i10(5). In addition, intradepartmental comparison of productivity among faculty members was analyzed by computing Gini coefficients for publications and citations.ResultsThe top 5 most academically productive North American neurosurgical programs based on ih(5)-index were found to be the University of Toronto, University of California at San Francisco, University of California at Los Angeles, University of Pittsburgh, and Brigham and Women's Hospital. The top 5 Canadian programs were the University of Toronto, University of Calgary, McGill University, University of Sherbrooke, and University of British Columbia. The median ih(5)-index for U.S. and Canadian programs was 12 and 10.5, respectively.ConclusionsThis is the most accurate comprehensive analysis to date of contemporary bibliometrics among North American neurosurgery departments. Using the ih(5)-index for institutional ranking allows for informative comparison of recent scholarly efforts.Copyright © 2016 Elsevier Inc. All rights reserved.

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