Table 4.

Comparison of Positive Likelihood Ratio’s by Outcome Definition

Mechanism of Injury	Criteria	Composite Outcome** +LR*	ISS>15 + LR*
Motor Vehicle Crash	Death of another occupant	6.8(2.7 – 16.7)	5.5 (2.2 – 13.6)
	Extrication > 20 min	5.0(3.2 – 8.0)	3.6 (2.2 – 5.9)
	Intrusion > 12″	3.7(2.6 – 5.3)	2.9 (2.0 – 4.2)
	Ejection	3.2(1.3 – 8.2)	7.1 (3.6 – 14.1)
	Deformity > 20″	2.3(1.7 – 3.0)	2.0 (1.6 – 2.7)
	Speed > 40 mph	1.8 (1.5 – 2.2)	1.7 (1.4 – 2.0)
	Rollover	1.0(0.7 – 1.5)	1.2 (0.9 – 1.7)
Fall	Fall >20ft	5.2(2.4 – 11.3)	2.1 (0.8 – 5.2)
Pedestrian/bicyclist	Thrown or run over	1.2(0.9 – 1.6)	1.3 (0.99 – 1.6)
	Struck at speed> 5 mph	1.2(1.0 – 1.5)	1.1 (0.95 – 1.4)
Motorcycle crash	Speed > 20 mph	1.1(0.96 – 1.3)	1.1 (0.9 – 1.3)
	Rider separated from motorcycle	1.0(0.9 – 1.2)	1.1 (1.0 – 1.2)

^*95% Confidence Interval shown in parenthesis.

^**Composite Outcome defined trauma center need as death, admitted to ICU, or non-orthopedic surgery within 24 hours of arrival.