Table 1 Characteristics of patients with a first traumatic brain injury-related visit in the emergency department or acute care and matched reference patients
Variables | Patients with TBI (n = 58,516) | Reference patients (n = 58,516) | ||
|---|---|---|---|---|
Female (n = 25,137; 43%) | Male (n = 33,379; 57%) | Female (n = 25,137; 43%) | Male (n = 33,379; 57%) | |
Sociodemographic characteristics | ||||
 Age at injury (years) | 39.41 (26.3) | 33.84 (24.3) | 39.41 (26.3) | 33.85 (24.3) |
 Income quintile |  |  |  |  |
  Q1 (lowest) | 4868 (19) | 6597 (20) | 4868 (19) | 6597 (20) |
  Q2 | 4895 (19) | 6645 (20) | 4895 (19) | 6645 (20) |
  Q3 | 4956 (20) | 6538 (20) | 4956 (20) | 6538 (20) |
  Q4 | 5269 (21) | 6913 (21) | 5269 (21) | 6913 (21) |
  Q5 (highest) | 5149 (20) | 6686 (20) | 5149 (20) | 6686 (20) |
 Rurality (yes) | 3842 (15) | 5242 (16) | 3842 (15) | 5242 (16) |
TBI-related characteristics | ||||
 TBI main diagnosis | 22,163 (88) | 29,542 (89) | NA | NA |
 Injury severity |  |  |  |  |
  Unspecified | 12,075 (48) | 12,961 (39) | NA | NA |
  Mild | 8260 (33) | 12,201 (37) | NA | NA |
  Moderate | 682 (3) | 1484 (4) | NA | NA |
  Severe | 4120 (16) | 6733 (20) | NA | NA |
Type of first healthcare entry | ||||
 Emergency Department | 21,284 (85) | 26,858 (80) | NA | NA |
 Acute Care | 1606 (6) | 2541 (8) | NA | NA |
 Emergency & Acutea | 2247 (9) | 3980 (12) | NA | NA |
External causes of injury, by CDCb | ||||
 Sports injury | 4668 (19) | 9804 (29) | NA | NA |
 Assault | 928 (4) | 3431 (10) | NA | NA |
 Falls | 13,080 (52) | 13,400 (40) | NA | NA |
 Motor vehicle collisions | 2587 (10) | 3221 (10) | NA | NA |
 Struck by/against | 7475 (30) | 13,370 (40) | NA | NA |
 Other | 2519 (10) | 4272 (13) | NA | NA |
 Missing | 44 (0) | 122 (0) | NA | NA |