title: Bibliometric evaluation of pediatric neurosurgery in North America.
abstract: OBJECTIVE
  The application of bibliometric techniques to academic neurosurgery has been the focus of several recent publications. The authors provide here a detailed analysis of all active pediatric neurosurgeons in North America and their respective departments.
  
  
  METHODS
  Using Scopus and Google Scholar, a bibliometric profile for every known active pediatric neurosurgeon in North America was created using the following citation metrics: h-, contemporary h-, g-, and e-indices and the m-quotient. Various subgroups were compared. Departmental productivity from 2008 through 2013 was measured, and departments were ranked on the basis of cumulative h- and e-indices and the total number of publications and citations. Lorenz curves were created, and Gini coefficients were calculated for all departments with 4 or more members.
  
  
  RESULTS
  Three hundred twelve pediatric neurosurgeons (260 male, 52 female) were included for analysis. For the entire group, the median h-index, m-quotient, contemporary h-, g-, and e-indices, and the corrected g- and e-indices were 10, 0.59, 7, 18, 17, 1.14, and 1.01, respectively; the range for each index varied widely. Academic pediatric neurosurgeons associated with fellowship programs (compared with unassociated neurosurgeons), academic practitioners (compared with private practitioners), and men (compared with women) had superior measurements. There was no significant difference between American and Canadian pediatric neurosurgeons. The mean Gini coefficient for publications was 0.45 (range 0.18-0.70) and for citations was 0.53 (range 0.25-0.80).
  
  
  CONCLUSIONS
  This study represents the most exhaustive evaluation of academic productivity for pediatric neurosurgeons in North America to date. These results should serve as benchmarks for future studies.
authors.affiliation: Semmes-Murphey Neurologic & Spine Institute;
authors.forename: Paul
authors.initials: P
authors.lastname: Klimo
authors.forename: Garrett T
authors.initials: GT
authors.lastname: Venable
authors.forename: Nickalus R
authors.initials: NR
authors.lastname: Khan
authors.forename: Douglas R
authors.initials: DR
authors.lastname: Taylor
authors.forename: Brandon A
authors.initials: BA
authors.lastname: Shepherd
authors.forename: Clinton J
authors.initials: CJ
authors.lastname: Thompson
authors.forename: Nathan R
authors.initials: NR
authors.lastname: Selden
mesh_terms: D000328:Adult; D015706:Bibliometrics; D002170:Canada; D002648:Child; D017598:Efficiency, Organizational; D005260:Female; D006801:Humans; D055811:Journal Impact Factor; D008297:Male; D008875:Middle Aged; D009493:Neurosurgery; D009656:North America; D010372:Pediatrics; D011642:Publications / Q000706:statistics & numerical data*; D012737:Sex Factors
keywords: Gini coefficient; Lorenz curve; North America; bibliometrics; citation analysis; department; hc-index = contemporary h-index; pediatric neurosurgery; rank