Table 1.

Patient Characteristics

		Age < 65 years (n = 502,167)	Age ≥ 65 years (n = 571,028)
Age (years)  16–25		1028,101 (21.5%)	.
26–35		81,860 (16.3%)	.
36–45		93,695 (18.7%)	.
46–55		117,357 (23.4%)	.
56–64		101,154 (20.1%)	.
65–75		.	139,392 (24.4%)
76–85		.	237,247 (41.2%)
≥86		.	194,389 (34.0%)
Gender   Male		337,195 (65.2%)	164,833 (28.9%)
Females		174,886 (34.8%)	406,158 (71.1%)
Missing		86 (0.02%)	37 (0.01%)
Race   White		413,072 (82.3%)	547,325 (95.9%)
Black		89,095 (17.7%)	23,703 (4.2%)
Insured   Yes		413,650 (82.4%)	567,361 (99.4%)
No		86,221 (17.2%)	3,075 (0.5%)
Missing		2,296 (0.5%)	592 (0.1%)
Intent   Unintentional		442,770 (88.2%)	569,324 (99.7%)
Self-inflicted		6,288 (1.3%)	594 (0.1%)
Assault		49,879 (9.9%)	1,010 (0.18%)
Undetermined		2,488 (0.5%)	70 (0.01%)
Other		742 (0.2%)	30 (0.01%)
Type of injury   Blunt		450,820 (89.8%)	568,485 (99.6%)
Penetrating		51,347 (10.2%)	2,543 (0.5%)
Injury Severity Score   <9		275,019 (54.8%)	218,819 (38.3%)
9–15		158,443 (31.6%)	307,850 (53.9%)
16–24		51,171 (10.2%)	39,224 (6.9%)
25–75		17,137 (3.4%)	5,077 (0.9%)
Severe head/neck injury (AIS>=3) Yes		69,566 (13.9%)	57,705 (10.1%)
No		432,601 (86.2%)	513,323 (89.9%)
Charlson Comorbidity Index  0		400,434 (79.7%)	247,287 (43.3%)
1		71,068 (14.2%)	172,299 (30.2%)
2		17,925 (3.57%)	83,881 (14.7%)
≥3		12,740 (2.5%)	67,561 (11.8%)
Mortality   Yes		8,837 (1.8%)	19,697 (3.5%)
No		493,263 (98.2%)	551,331 (96.6%)