The effect of age and sex on outcomes following isolated moderate to severe traumatic brain injury

Abstract

Purpose

The impact of female sex on traumatic brain injury (TBI) outcomes remains controversial. The combined impact of age and sex on TBI outcomes must be clarified. We hypothesized that females have better outcomes than males in the premenopausal age group.

Methods

Data from the 2007–2016 National Trauma Data Bank of the Committee on Trauma-American College of Surgeons were used. Of a total of 686,549 patients with moderate to severe TBI (AIS ≥ 3), 251,491 were female. Comparison analyses of clinical characteristics and outcomes between females and males were conducted at different age groups: < 45 years, 45–55, and > 55 years. Logistic regressions were performed to assess the impact of age and female sex on mortality and complications.

Results

Mortality rate between females and males aged < 45 and 45–55 years was similar, but significantly reduced in the > 55 years group. After multivariate logistic regression analysis controlling for multiple confounding factors, we found that females aged > 55 years had markedly decreased risk of mortality (AOR: 0.857, 95% CI 0.835–0.879, p < 0.001) and complications.

Conclusion

Female patients in the postmenopausal stage have better outcomes following TBI than males, but pre- and perimenopausal females do not, suggesting that female sexual hormones may not provide a significant protective effect on clinical outcomes following isolated moderate to severe TBI.

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Funding

There was no funding associated with the development and execution of this research project.

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Contributions

Study design, conception, and critical revision: Zhi-Jie Hong, Katharina Mörs, Cora Schindler, Ingo Marzi, Raul Coimbra. Acquisition, analysis, and interpretation of data: Matthew Firek, Bishoy Zachary, Zhi-Jie Hong, Raul Coimbra. Literature search and drafting of manuscript: Zhi-Jie Hong, Jyh-Cherng Yu, Katharina Mörs, Cora Schindler. Final Manuscript review/editing: Raul Coimbra, Ingo Marzi.

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Correspondence to Raul Coimbra.

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The current study was reviewed by the Riverside University Health System Institutional Review Board (protocol # 1636962) and it was deemed exempt from informed consent as it uses only deidentified data from a national administrative data base.

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Hong, ZJ., Firek, M., Zachary, B. et al. The effect of age and sex on outcomes following isolated moderate to severe traumatic brain injury. Eur J Trauma Emerg Surg (2020). https://doi.org/10.1007/s00068-020-01491-1

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Keywords

  • Traumatic brain injury
  • Gender
  • Outcome
  • Estrogen
  • Mortality