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Multicenter Study
. 2014 Jan 28:22:7.
doi: 10.1186/1757-7241-22-7.

Higher mortality rates among the elderly with mild traumatic brain injury: a nationwide cohort study

Po-Liang Cheng, Hsin-Yi Lin, Yi-Kung Lee, Chen-Yang Hsu, Ching-Chih Lee, Yung-Cheng Su  1
Affiliations
Multicenter Study

Higher mortality rates among the elderly with mild traumatic brain injury: a nationwide cohort study

Po-Liang Cheng et al. Scand J Trauma Resusc Emerg Med. .

Abstract

Background: It is known that the risk of death in elderly patients with moderate to severe traumatic brain injury is increased. However, the relationship between mild traumatic brain injury and death has never been established. We investigated the mortality rates of older patients with mild traumatic brain injury in Taiwan to evaluate if there is a higher risk of death compared with the general population.

Methods: We utilized a sampled National Health Insurance claims database containing one million beneficiaries. We followed all adult beneficiaries older than 65 years from January 1, 2005 till December 31, 2009 to see if they died. We further identified patients with mild traumatic brain injury and compared their risk of death with the general population.

Results: We identified 5997 patients with mild traumatic brain injury and 84,117 patients without mild traumatic brain injury. After controlling for age, gender, urbanization level, socioeconomic status, diabetes, hypertension, history of alcohol intoxication, history of ischemic stroke, history of intracranial hemorrhage, malignancies, dementia and Charlson Comorbidity Index score, the adjusted hazard ratio was 1.25 (95% confidence interval, 1.16-1.34).

Conclusions: Mild traumatic brain injury is an independent significant risk factor for death in the elderly.

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Figures

Figure 1
Figure 1
Flow diagram of population-based study.
Figure 2
Figure 2
Survival curves of mild TBI group and control group.
Figure 3
Figure 3
Sensitivity analyses of an unmeasured confounder.
See this image and copyright information in PMC

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