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Table 1 Baseline characteristics of the mild TBI group and control group

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

Variables Mild TBI group (n =5997) Control group (n = 84117) P-value
  No. % No. %  
Male 2851 47.5 41988 49.9 <0.001
Mean age (SD) 75.8 7.3 73.6 6.5 <0.001
Socioeconomic status      <0.001
  Low 3904 65.1 56606 67.3  
  Moderate 2055 34.3 26892 32.0  
  High 38 0.6 619 0.7  
Urbanization level      <0.878
  Urban 1376 22.9 19166 22.8  
  Suburban 2276 38.0 31781 37.8  
  Rural 2345 39.1 33170 39.4  
Charlson Comorbidity Index score      <0.001
  0 1262 21.0 21662 25.8  
  1 2167 36.1 29135 34.6  
  ≥ 2 2568 42.8 33320 39.6  
Diabetes 1665 27.8 20511 24.4 <0.001
Hypertension 3640 60.7 48953 58.2 <0.001
History of alcohol intoxication 60 1.0 543 0.7 0.001
Ischemic stroke 1375 22.9 16047 19.1 <0.001
Intracranial hemorrhage 109 1.8 1218 1.5 0.022
Malignancies 298 5.0 4692 5.6 0.046
Dementia 1712 28.6 21465 25.5 <0.001