title: Academic Productivity of Neurosurgeons Working in the United Kingdom: Insights from the H-Index and Its Variants.
abstract: OBJECTIVE
  Academic metrics can be used to compare the productivity of researchers. We aimed to use a variety of bibliometric parameters to assess the productivity of neurosurgeons working in the United Kingdom.
  
  
  METHODS
  Neurosurgical consultants working in the United Kingdom were identified using the Society of British Neurosurgeons' Audit Programme website. Baseline data collected included year of entry to specialist register, academic position and award of higher degree. Google Scholar was used to compute a range of academic metrics for each consultant including the h-index, hi-norm, e-index and g-index. Non-parametric tests were used to compare median results.
  
  
  RESULTS
  Median metrics for the whole cohort were: h-index (5), hi-norm (3), g-index (10.4) and e-index (9). The top 3 units based on h-index were Addenbrookes (13), Great Ormond Street (12.5) and Queen's Square (11.5). The h-index correlated with academic position [Prof (17.5), Senior Lecturer (10.5) and non-academic (5); P < 0.0001], higher degree [PhD (10), MD (6) and none (4.5); P < 0.0001] and consultant experience [> 10 year (7), < 10 years (4); P < 0.0001]. No difference was found based on gender [male (5), female (4); P = 0.12]. The same trends were seen across the following other metrics: hi-norm, e-index and g-index.
  
  
  CONCLUSIONS
  This study details the academic impact of United Kingdom-based neurosurgeons through the analysis of a number of citation metrics. It provides a benchmark bibliometric profile and we advocate future comparative assessments as a means to assess impact of and guide academic policy.
authors.affiliation: Department of Clinical Neuroscience, Western General Hospital, Edinburgh, United Kingdom. Electronic address: aabjamjoom@gmail.com.
authors.forename: Aimun A B
authors.initials: AA
authors.lastname: Jamjoom
authors.affiliation: Department of Clinical Neuroscience, Western General Hospital, Edinburgh, United Kingdom.
authors.forename: A N
authors.initials: AN
authors.lastname: Wiggins
authors.affiliation: Department of Neurosurgery, Aberdeen Royal Infirmary, Aberdeen, United Kingdom.
authors.forename: J J M
authors.initials: JJ
authors.lastname: Loan
authors.affiliation: Department of Clinical Neuroscience, Western General Hospital, Edinburgh, United Kingdom.
authors.forename: J
authors.initials: J
authors.lastname: Emelifeoneu
authors.affiliation: Department of Clinical Neuroscience, Western General Hospital, Edinburgh, United Kingdom.
authors.forename: I P
authors.initials: IP
authors.lastname: Fouyas
authors.affiliation: Department of Clinical Neuroscience, Western General Hospital, Edinburgh, United Kingdom.
authors.forename: P M
authors.initials: PM
authors.lastname: Brennan
mesh_terms: D000465:Algorithms; D015706:Bibliometrics; D015331:Cohort Studies; D004526:Efficiency; D005260:Female; D006801:Humans; D020407:Internet; D008297:Male; D000069471:Neurosurgeons; D009493:Neurosurgery / Q000706:statistics & numerical data*; D011643:Publishing / Q000706:statistics & numerical data*; D057386:Search Engine; D006113:United Kingdom
keywords: Bibliometrics; Neurosurgery; United Kingdom; h-index