Table 1.
Characteristics of the overall and matched cohorts and the standardized mean differences between groups.
| Overall Cohort (n = 141 435) |
Matched Cohort (n = 14 552) |
|||||
|---|---|---|---|---|---|---|
| TBI (n = 133 684) | TBI + SCI (n = 7751) | SMD (%) | TBI (n = 7276) | TBI + SCI (n = 7276) | SMD (%) | |
| Age (year) | ||||||
| <30 | 25 751 (19.3) | 1460 (18.8) | 1.5 | 1316 (18.1) | 1311 (18.0) | 0.2 |
| 31-40 | 10 344 (7.7) | 756 (9.8) | 6.7 | 745 (10.2) | 701 (9.6) | 2.1 |
| 41-50 | 11 893 (8.9) | 875 (11.3) | 7.9 | 774 (10.6) | 819 (11.3) | 2.0 |
| 51-60 | 13 188 (9.9) | 968 (12.5) | 7.9 | 883 (12.1) | 912 (12.5) | 1.2 |
| 61-70 | 14 156 (10.6) | 990 (12.8) | 7.2 | 942 (12.9) | 937 (12.9) | 0.2 |
| 71-80 | 19 562 (14.6) | 1109 (14.3) | 0.4 | 1065 (14.6) | 1058 (14.5) | 0.3 |
| >80 | 38 790 (29) | 1593 (20.6) | 21.5 | 1551 (21.3) | 1538 (21.1) | 0.4 |
| Gender | ||||||
| Female | 48 602 (36.4) | 2716 (35) | 3.3 | 2583 (35.5) | 2564 (35.2) | 0.5 |
| Male | 85 082 (63.6) | 5035 (65) | 4693 (64.5) | 4712 (64.8) | ||
| GCS | ||||||
| 3-8 | 17 916 (14.8) | 1301 (17.8) | 7.9 | 1307 (18) | 1295 (17.8) | 0.4 |
| 9-12 | 11 880 (9.8) | 529 (7.3) | 9.9 | 517 (7.1) | 522 (7.2) | 0.3 |
| 13-15 | 91 005 (75.3) | 5459 (74.9) | 1.0 | 5452 (74.9) | 5459 (75.0) | 0.2 |
| ISS Band | ||||||
| 1-8 | 5239 (3.9) | 343 (4.4) | 2.4 | 352 (4.8) | 331 (4.5) | 1.4 |
| 9-15 | 21 784 (16.3) | 1963 (25.3) | 21.0 | 1883 (25.9) | 1895 (26.0) | 0.4 |
| >15 | 106 661 (79.8) | 5445 (70.2) | 21.1 | 5041 (69.3) | 5050 (69.4) | 0.3 |
| AIS TBI severity | ||||||
| 1-2 | 16 311 (12.2) | 3232 (41.7) | 60.0 | 3114 (42.8) | 3093 (42.5) | 0.6 |
| 3-4 | 69 433 (51.9) | 2860 (36.9) | 30.7 | 2625 (36.1) | 2678 (36.8) | 1.5 |
| 5-6 | 47 940 (35.9) | 1659 (21.4) | 36.7 | 1537 (21.1) | 1505 (20.7) | 1.1 |
TBI: Traumatic brain injury.
SCI: Spinal cord injury.
SMD: Standardized mean difference.
GCS: Glasgow Coma Scale.
ISS: Injury Severity Score.
AIS: Abbreviated Injury Scale.