title: Five-Year Institutional Bibliometric Profiles for 119 North American Neurosurgical Residency Programs: An Update.
abstract: BACKGROUND
  We 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.
  
  
  METHODS
  Departments 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.
  
  
  RESULTS
  The 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.
  
  
  CONCLUSIONS
  This 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.
authors.affiliation: College of Medicine, University of Tennessee Health Science Center, Memphis, Tennessee, USA.
authors.forename: Ryan P
authors.initials: RP
authors.lastname: Lee
authors.affiliation: Department of Neurosurgery, University of Tennessee Health Science Center, Memphis, Tennessee, USA.
authors.forename: Garrett T
authors.initials: GT
authors.lastname: Venable
authors.affiliation: College of Medicine, University of Tennessee Health Science Center, Memphis, Tennessee, USA.
authors.forename: Mallory L
authors.initials: ML
authors.lastname: Roberts
authors.affiliation: College of Medicine, Louisiana State University, New Orleans, Louisiana, USA.
authors.forename: Kara A
authors.initials: KA
authors.lastname: Parikh
authors.affiliation: Department of Neurosurgery, University of Tennessee Health Science Center, Memphis, Tennessee, USA.
authors.forename: Douglas R
authors.initials: DR
authors.lastname: Taylor
authors.affiliation: Department of Neurosurgery, University of Tennessee Health Science Center, Memphis, Tennessee, USA.
authors.forename: Nickalus R
authors.initials: NR
authors.lastname: Khan
authors.affiliation: Department of Neurosurgery, University of Tennessee Health Science Center, Memphis, Tennessee, USA; Semmes-Murphey Neurologic & Spine Institute, Memphis, Tennessee, USA.
authors.forename: L Madison
authors.initials: LM
authors.lastname: Michael
authors.affiliation: Department of Neurosurgery, University of Tennessee Health Science Center, Memphis, Tennessee, USA; Semmes-Murphey Neurologic & Spine Institute, Memphis, Tennessee, USA. Electronic address: pklimo@semmes-murphey.com.
authors.forename: Paul
authors.initials: P
authors.lastname: Klimo
mesh_terms: D000046:Academic Medical Centers; D015706:Bibliometrics; D002170:Canada; D004526:Efficiency; D006801:Humans; D007396:Internship and Residency; D009493:Neurosurgery / Q000193:education*; D011643:Publishing; D014481:United States
keywords: Bibliometrics; Canada; Gini coefficient; Institutional; Neurosurgery; Rank; e-Index; g-Index; h-Index; i10-Index