Sex and Age Differences in Isolated Traumatic Brain Injury: a Retrospective Observational Study

Overview

Journal BMC Neurol

Publisher Biomed Central

Specialty Neurology

Date 2021 Jul 6

PMID 34225691

Citations 6

Authors

Sanae Hosomi

Tetsuhisa Kitamura

Tomotaka Sobue

Hiroshi Ogura

Takeshi Shimazu

Affiliations

Soon will be listed here.

Abstract

Background: Among the many factors that may influence traumatic brain injury (TBI) progression, sex is one of the most controversial. The objective of this study was to investigate sex differences in TBI-associated morbidity and mortality using data from the largest trauma registry in Japan.

Methods: This retrospective, population-based observational study included patients with isolated TBI, who were registered in a nationwide database between 2004 and 2018. We excluded patients with extracranial injury (Abbreviated Injury Scale score ≥ 3) and removed potential confounding factors, such as non-neurological causes of mortality. Patients were stratified by age and mortality and post-injury complications were compared between males and females.

Results: A total of 51,726 patients with isolated TBI were included (16,901 females and 34,825 males). Mortality across all ages was documented in 12.01% (2030/16901) and 12.76% (4445/34825) of males and females, respectively. The adjusted odds ratio (OR) of TBI mortality for males compared to females was 1.32 (95% confidence interval [CI], 1.22-1.42]. Males aged 10-19 years and ≥ 60 years had a significantly higher mortality than females in the same age groups (10-19 years: adjusted OR, 1.97 [95% CI, 1.08-3.61]; 60-69 years: adjusted OR, 1.24 [95% CI, 1.02-1.50]; 70-79 years: adjusted OR, 1.20 [95% CI, 1.03-1.40]; 80-89 years: adjusted OR, 1.50 [95% CI, 1.31-1.73], and 90-99 years: adjusted OR, 1.72 [95% CI, 1.28-2.32]). In terms of the incidence of post-TBI neurologic and non-neurologic complications, the crude ORs were 1.29 (95% CI, 1.19-1.39) and 1.14 (95% CI, 1.07-1.22), respectively, for males versus females. This difference was especially evident among elderly patients (neurologic complications: OR, 1.27 [95% CI, 1.14-1.41]; non-neurologic complications: OR, 1.29 [95% CI, 1.19-1.39]).

Conclusions: In a nationwide sample of patients with TBI in Japan, males had a higher mortality than females. This disparity was particularly evident among younger and older generations. Furthermore, elderly males experienced more TBI complications than females of the same age.

Citing Articles

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