Table 3.

Characteristics of the overall and matched cohorts and the standardized mean differences between groups.

	Overall Cohort (n = 34 100)			Matched Cohort (n = 11 852)
	SCI (n = 26 349)	TBI + SCI (n = 7751)	SMD (%)	SCI (n = 5926)	TBI + SCI (n = 5926)	SMD (%)
Age (year)
<30	4337 (16.5)	1460 (18.8)	4.4	884 (14.9)	878 (14.8)	0.3
31-40	2475 (9.4)	756 (9.8)	0.9	535 (9.0)	535 (9.0)	<0.1
41-50	3016 (11.4)	875 (11.3)	0.5	647 (10.9)	663 (11.2)	0.9
51-60	3883 (14.7)	968 (12.5)	6.4	784 (13.2)	786 (13.3)	0.1
61-70	3808 (14.5)	990 (12.8)	3.9	813 (13.7)	831 (14.0)	0.9
71-80	3952 (15.0)	1109 (14.3)	1.4	947 (16.0)	914 (15.4)	1.6
>80	4878 (18.5)	1593 (20.6)	5.2	1316 (22.2)	1319 (22.3)	0.1
Gender
Female	11 199 (42.5)	2716 (35.0)	15.6	2148 (36.2)	2174 (36.7)	0.9
Male	15 150 (57.5)	5035 (65.0)		3778 (63.8)	3752 (63.3)
GCS
3-8	461 (1.9)	1301 (17.8)	41.6	378 (6.4)	381 (6.4)	0.1
9-12	381 (1.6)	529 (7.3)	21.8	249 (4.2)	253 (4.3)	0.3
13-15	23 072 (96.5)	5459 (74.9)	49.8	5299 (89.4)	5292 (89.3)	0.3
ISS Band
1-8	3816 (14.5)	343 (4.4)	47.6	318 (5.4)	330 (5.6)	1.0
9-15	14 241 (54.0)	1963 (25.3)	64.6	1911 (32.2)	1883 (31.8)	1.1
>15	8292 (31.5)	5445 (70.2)	83.0	3697 (62.4)	3713 (62.7)	0.6
AIS SCI severity
1-2	8714 (33.1)	3288 (42.4)	18.9	2458 (41.5)	2450 (41.3)	0.3
3-4	16 350 (62.1)	3902 (50.3)	23.2	3067 (51.8)	3063 (51.7)	0.1
5-6	1285 (4.9)	561 (7.2)	8.9	401 (6.8)	413 (7.0)	0.8
Level of SCI
Cervical spine	5649 (21.4)	2321 (29.9)	18.9	1765 (29.8)	1765 (29.8)	<0.1
Thoracic spine	5761 (21.9)	1655 (21.4)	1.6	1260 (21.3)	1275 (21.5)	0.6
Lumbar spine	6541 (24.8)	707 (9.1)	55.5	562 (9.5)	577 (9.7)	0.9

SCI: Spinal cord injury; TBI: Traumatic brain injury; SMD: Standardized mean difference; GCS: Glasgow Coma Scale; ISS: Injury Severity Score.

AIS: Abbreviated Injury Scale.