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 |