Table 2.

Comparison of demographics between patients with Mangled Extremity Severity Score (MESS) < 8 and MESS of 8 or greater.

		MESS Score
	All	MESS < 8	MESS ≥ 8
Variable	(n = 230)	(n = 214)	(n = 16)	p-value
Age (Mean ± SD)	34 ± 15.3	32.8 ± 14.7	48.3 ± 15.6	0.0003
Male, n (%)	202 (87.8)	187 (87.4)	15 (93.8)	0.4
Injury Mechanism				0.004
Blunt, n (%)	109 (47.4)	96 (44.9)	13 (81.3)
Penetrating, n (%)	114 (49.6)	112 (52.3)	2 (12.5)
Mixed blunt and penetrating, n (%)	7 (3.0)	6 (2.8)	1 (6.3)
Injured artery:				0.7
Femoral, n (%)	102 (44.3)	97 (45.3)	5 (31.3)
Popliteal, n (%)	60 (26.1)	55 (25.7)	5 (31.3)
Distal to popliteal artery, n (%)	63 (27.4)	57 (26.6)	6 (37.5)
Multiple levels, n (%)	5 (2.2)	5 (2.3)	0 (0)
Transection, n (%)	105 (45.7)	93 (43.5)	12 (75)	0.01
Flow limiting defect, n (%)	44 (19.1)	42 (19.6)	2 (12.5)	0.4
Occlusion, n (%)	38 (16.5)	36 (16.8)	2 (12.5)	0.5
Pseudoaneurysm, n (%)	9 (3.9)	9 (4.2)	0 (0)	0.5
Other injury type, n (%)	41 (17.8)	40 (18.7)	1 (6.3)	0.2
Median ISS (Q1, Q3)	11 (9, 19)	10.5 (9, 18)	21 (17, 26)	0.0003
Median AIS-extremity (Q1, Q3)	3 (3, 4)	3 (3, 4)	3 (3, 4)	0.1
Mean Admission SBP ± SD	120.9 ± 30.0	121.4 ± 29.9	115.9 ± 31.7	0.5
Median GCS (Q1, Q3)	15 (14, 15)	15 (15, 15)	15 (14, 15)	0.7
Concomitant venous injury, n (%)	50 (21.7)	46 (21.5)	4 (25)	0.5
Vein repaired, n (%)	47/50 (94.0)	43/46 (93.4)	4/4 (100%)	0.4
Concomitant nerve injury, n (%)	33 (14.4)	22 (10.3)	11 (68.8)	< 0.001
Concomitant orthopedic injury, n (%)	94 (40.9)	83 (38.8)	11 (68.8)	0.02
Pre-hospital Tourniquet, n (%)	22 (9.6)	20 (9.4)	2 (12.5)	0.5
Temporary shunt utilized, n (%)	17 (7.4)	17 (7.9)	0 (0)	0.3
Fasciotomy, n (%)	94 (40.9)	89 (41.6)	5 (31.3)	0.3

ISS = Injury severity score

AIS = Abbreviated injury score

SBP = Systolic blood pressure

GCS = Glasgow coma score

MESS = Mangled extremity severity score

Q1 = Lower quantile (25th percentile)

Q3 = Upper quantile (75th percentile)