Table 1.

Characteristics of traffic-related patients at King Abdulaziz Medical City (KAMC) and National Trauma Data Bank (NTDB)

Variable	KAMC registryN = 5,290	NTDB N = 485,611
Age category %
0-14	20.4	6.8
15-25	39.8	28.0
26-45	27.9	32.5
46-64	7.9	22.1
≥65	3.9	10.5
Missing %	0	1.3
Male %	85.5	63.4
Missing %	0	0.6
Role %
Occupant	73.3	87.9
Motorcycle	4.3	5.8
Pedestrians	22.4	5.0
Bicyclists	A	1.1
Mean T-RTS [Median, IQR]	11.0 [12,1.6]	10.9 [11,1.8]
Missing %	0	7.7
Mean ISS [Median, IQR]	12.9 [9,11.3]	12.1 [9,10.8]
Missing %	0.1	7.5
ISS Categories
(1–8) N (%)	2,040 (38.5)	209,574 (43.1)
(9–15) N (%)	1,693 (32.0)	132,347 (27.2)
(16–24) N (%)	687 (13.0)	85,222 (17.5)
(25–75) N (%)	870 (16.4)	58,468 (12.0)
SBP < 90 %	4.4	3.8
Missing %	0.7	2.8
Surgery %	20.8	12.4
Missing %	0	1.0
Head injury %	42.5	17.1
Missing %	0	0
Died in the hospital %	8.3	4.3
Missing %	0	1.9

All differences significant at p < 0.001,except for SBP at p < 0.01.

^ABicyclists are added to pedestrians in King Abdulaziz Medical City (KAMC) registry.

*Chi-2 test; ^Student t-test.

ISS Injury Severity Score; T-RTS Triage-Revised Trauma Scale.

SBP Systolic Blood Pressure.