Acta Neurochirurgica

, Volume 161, Issue 10, pp 1969–1974 | Cite as

Academic output of German neurosurgical residents in 35 academic neurosurgery residency programs

  • Fatma Kilinc
  • Florian Gessler
  • Daniel Dubinski
  • Sae-Yeon Won
  • Johanna Quick-Weller
  • Volker Seifert
  • Bedjan BehmaneshEmail author
Original Article - Neurosurgery Training
Part of the following topical collections:
  1. Neurosurgery training



The scientific activity of neurosurgeons and neurosurgery residents as measured by bibliometric parameters is of increased interest. While data about academic output for neurosurgeons in the USA, the UK, and Canada have been published, no similar results for German neurosurgical residents exist. Within this study, we aim to evaluate the academic output of German neurosurgery residents in 35 academic residency programs.


Data for each resident were collected from the departmental websites, Pubmed, and Scopus. Further analyses evaluated the relationship between publication productivity, sex, and academic degree (Dr. med.).


Data from 424 neurosurgery residents were analyzed. A total of 1222 publications were considered. A total of 355 (29%) of the 1222 publications were first-author publications. The average number of publications per resident was 2.9; the average h-index and m-quotient was 1.1 and 0.4, respectively. There was a statistically significant difference in academic output and h-index among neurosurgical residents with a doctoral degree compared with residents without such degree (5.3 vs. 1.3, p < 0.0001 and 2.0 vs. 0.5, p < 0.0001).


This is the very first study evaluating the academic output of neurosurgical residents in academic neurosurgical departments in Germany.


Residents Neurosurgery H-index M-quotient Gender Publication 


Compliance with ethical standards

Conflict of interest

The authors declare that they have no conflict of interest.

Ethical approval

All procedures performed in studies involving human participants were in accordance with the ethical standards of the institutional and/or national research committee and with the 1964 Helsinki declaration and its later amendments or comparable ethical standards.

Informed consent

Informed consent was not necessary. All data were used were published on departmental homepages, pubmed ans Sopus.


  1. 1.
    Blakemore LC, Hall JM, Biermann JS (2003) Women in surgical residency training programs. J Bone Joint Surg Am 85–A(12):2477–2480CrossRefGoogle Scholar
  2. 2.
    Borman KR (2007) Gender issues in surgical training: from minority to mainstream. Am Surg 73(2):161–165Google Scholar
  3. 3.
    Bornmann L, Daniel H-D (2007) What do we know about the h index? J Am Soc Inf Sci Technol 58(9):1381–1385CrossRefGoogle Scholar
  4. 4.
    Bornmann L, Daniel H-D (2009) The state of h index research. Is the h index the ideal way to measure research performance? EMBO Rep 10(1):2–6CrossRefGoogle Scholar
  5. 5.
    Daniels M, Garzon-Muvdi T, Maxwell R, Tamargo RJ, Huang J, Witham T, Bettegowda C, Chaichana KL (2017) Preresidency publication number does not predict academic career placement in neurosurgery. World Neurosurgery 101:350–356CrossRefGoogle Scholar
  6. 6.
    Fijalkowski N, Zheng LL, Henderson MT, Moshfeghi AA, Maltenfort M, Moshfeghi DM (2013) Academic productivity and its relationship to physician salaries in the University of California Healthcare System. South Med J 106(7):415–421CrossRefGoogle Scholar
  7. 7.
    Garner RM, Hirsch JA, Albuquerque FC, Fargen KM (2018) Bibliometric indices: defining academic productivity and citation rates of researchers, departments and journals. J NeuroInterventional Surg 10(2):102–106CrossRefGoogle Scholar
  8. 8.
    Hirsch JE (2005) An index to quantify an individual’s scientific research output. Proc Natl Acad Sci U S A 102(46):16569–16572CrossRefGoogle Scholar
  9. 9.
    Jamjoom AAB, Wiggins AN, Loan JJM, Emelifeoneu J, Fouyas IP, Brennan PM (2016) Academic productivity of neurosurgeons working in the United Kingdom: insights from the h-index and its variants. World neurosurgery 86:287–293CrossRefGoogle Scholar
  10. 10.
    Khan NR, Saad H, Oravec CS et al (2018) An analysis of publication productivity during residency for 1506 neurosurgical residents and 117 residency departments in North America. Neurosurgery.
  11. 11.
    Khan N, Thompson CJ, Choudhri AF, Boop FA, Klimo P (2013) Part I: the application of the h-index to groups of individuals and departments in academic neurosurgery. World Neurosurgery 80(6):759–765.e3CrossRefGoogle Scholar
  12. 12.
    Khan NR, Thompson CJ, Taylor DR, Gabrick KS, Choudhri AF, Boop FR, Klimo P (2013) Part II: should the h-index be modified? An analysis of the m-quotient, contemporary h-index, authorship value, and impact factor. World Neurosurgery 80(6):766–774CrossRefGoogle Scholar
  13. 13.
    Khan NR, Thompson CJ, Taylor DR, Venable GT, Wham RM, Michael LM, Klimo P (2014) An analysis of publication productivity for 1225 academic neurosurgeons and 99 departments in the United States. J Neurosurg 120(3):746–755CrossRefGoogle Scholar
  14. 14.
    Lee RP, Xu R, Dave P et al (2018) Taking the next step in publication productivity analysis in pediatric neurosurgery. J Neurosurg Pediatr 21(6):655–665CrossRefGoogle Scholar
  15. 15.
    Lozano CS, Tam J, Kulkarni AV, Lozano AM (2015) The academic productivity and impact of the University of Toronto Neurosurgery Program as assessed by manuscripts published and their number of citations. J Neurosurg 123(3):561–570CrossRefGoogle Scholar
  16. 16.
    Sarkiss CA, Riley KJ, Hernandez CM, Oermann EK, Ladner TR, Bederson JB, Shrivastava RK (2017) Academic productivity of US neurosurgery residents as measured by h-index: program ranking with correlation to faculty productivity. Neurosurgery 80(6):975–984CrossRefGoogle Scholar
  17. 17.
    Schoenfeld AJ, Bhalla A, George J, Harris MB, Bono CM (2015) Academic productivity and contributions to the literature among spine surgery fellowship faculty. Spine J: Off J N Am Spine Soc 15(10):2126–2131CrossRefGoogle Scholar
  18. 18.
    Spearman CM, Quigley MJ, Quigley MR, Wilberger JE (2010) Survey of the h index for all of academic neurosurgery: another power-law phenomenon? J Neurosurg 113(5):929–933CrossRefGoogle Scholar
  19. 19.
    van Raan AFJ (2006) Comparison of the Hirsch-index with standard bibliometric indicators and with peer judgment for 147 chemistry research groups. Scientometrics 67(3):491–502CrossRefGoogle Scholar
  20. 20.
    Wei M, Wang W, Zhuang Y (2016) Worldwide research productivity in the field of spine surgery: a 10-year bibliometric analysis. Eur Spine J: Off Publ Eur Spine Soc, Eur Spinal Deformity Soc Eur Sect Cervical Spine Res Soc 25(4):976–982CrossRefGoogle Scholar
  21. 21.
    Wilkes FA, Akram H, Hyam JA, Kitchen ND, Hariz MI, Zrinzo L (2015) Publication productivity of neurosurgeons in Great Britain and Ireland. J Neurosurg 122(4):948–954CrossRefGoogle Scholar
  22. 22.
    Woodrow SI, Gilmer-Hill H, Rutka JT (2006) The neurosurgical workforce in North America: a critical review of gender issues. Neurosurgery 59(4):749–755 discussion 755–8CrossRefGoogle Scholar
  23. 23.
    Wright AL, Ryan K, St Germain P, Schwindt L, Sager R, Reed KL (2007) Compensation in academic medicine: progress toward gender equity. J Gen Intern Med 22(10):1398–1402CrossRefGoogle Scholar
  24. 24.
    Wright AL, Schwindt LA, Bassford TL, Reyna VF, Shisslak CM, St Germain PA, Reed KL (2003) Gender differences in academic advancement: patterns, causes, and potential solutions in one US College of medicine. Acad Med: J Assoc Am Med Coll 78(5):500–508CrossRefGoogle Scholar
  25. 25.
    Yang G, Villalta JD, Weiss DA, Carroll PR, Breyer BN (2012) Gender differences in academic productivity and academic career choice among urology residents. J Urol 188(4):1286–1290CrossRefGoogle Scholar

Copyright information

© Springer-Verlag GmbH Austria, part of Springer Nature 2019

Authors and Affiliations

  • Fatma Kilinc
    • 1
  • Florian Gessler
    • 1
  • Daniel Dubinski
    • 1
  • Sae-Yeon Won
    • 1
  • Johanna Quick-Weller
    • 1
  • Volker Seifert
    • 1
  • Bedjan Behmanesh
    • 1
    Email author
  1. 1.Department of NeurosurgeryGoethe University HospitalFrankfurt am MainGermany

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