Table 5.

Adjusted Multiple Logistic Regression Results

	Multiple Logistic Regression*
	n = 7,560
	OR**	95% CI	P
Demographics
Age (unit = 10 years)	1.177	0.998–1.388	0.054
Gender
Male	Reference group
Female	0.407	0.244–0.680	0.001
Economic Characteristics
Insurance
Uninsured	0.681	0.413–1.123	0.132
Medicare	1.571	0.823–2.997	0.171
Medicaid	1.477	0.778–2.804	0.233
Private insurance	Reference group
Treatment Characteristics
Days to first emergency procedure
HD #0	Reference group
HD #1	3.814	1.801–8.074	<0.001
HD #2	3.816	1.511–9.638	0.005
HD #3–4	4.023	1.832–8.832	0.001
HD #5 or greater	11.417	5.928–21.991	<0.001
Timing unspecified	0.611	0.251–1.484	0.276
Patient/Injury Characteristics
Injury severity score (ISS)
<10	Reference group
10 – 20	1.067	0.712–1.600	0.754
>20	0.714	0.318–1.602	0.414
Comorbidities
Diabetes	2.599	1.115–6.058	0.027
Cardiac (CHF, PVD, HTN w/ complications)	1.106	0.548–2.234	0.778
Associated injuries/procedures
Arterial injury (popliteal, AT, PT)	7.279	3.446–15.376	<0.001
Tibial nerve injury	15.669	1.950–125.927	0.010
Complicated open wound	1.664	0.928–2.984	0.087
Fasciotomy	1.111	0.434–2.842	0.827
Hospital Characteristics
Admission type
Trauma center	1.390	0.872–2.215	0.167
Nontrauma center	Reference group
Unspecified	1.049	0.559–1.971	0.881
Location
Rural	Reference group
Urban	0.280	0.137–0.570	<0.001
Bed size
Small	2.655	0.590–11.942	0.203
Medium	1.844	1.098–3.095	0.021
Large	Reference group

^*grey boxes indicate nonsignificant odds ratio

^**All odds ratios (OR) adjusted for patient demographic, economic, injury risk factors, and hospital control variables that appear in Figure 2.