Table 4. Logistic Regression Analysis of In-Hospital Mortality after Blunt and Penetrating Injury in Shelby County, TN, 1996 – 2005.

Variable	Blunt Injury (n = 12,605), Odds Ratio (95% CI)	Penetrating Injury (n = 5,053), Odds Ratio (95% CI)
N-SES Category*
Highest	Referent	Referent
High-middle	0.90 (0.57, 1.44)	1.35 (0.48, 3.81)
Middle	1.22 (0.78, 1.87)	2.77 (0.99, 7.25)
Low-middle	0.89 (0.58, 1.39)	1.44 (0.55, 3.74)
Lowest	0.67 (0.42, 1.08)	1.03 (0.39, 2.73)
Age, y†	1.05 (1.05, 1.06)	1.02 (1.00, 1.04)
Admission systolic blood pressure (mmHg)‡	0.98 (0.97, 0.98)	0.98 (0.98, 0.99)
Injury Severity Score§	1.07 (1.06, 1.08)	1.11 (1.09, 1.13)
Admission GCS motor response∥
6	Referent	Referent
4 – 5	7.07 (5.11, 9.76)	8.50 (5.06, 14.29)
2 – 3	11.20 (6.33, 19.82)	47.74 (23.07, 98.78)
1	36.56 (26.42, 50.60)	82.91 (51.52, 133.42)

^*N-SES, Neighborhood Socioeconomic Status; n missing from blunt injury = 0; n missing from penetrating injury = 0.

^†n Missing from blunt injury = 1; n missing from penetrating injury = 0.

^‡n Missing from blunt injury = 205; n missing from penetrating injury = 94.

^§n Missing from blunt injury = 519; n missing from penetrating injury = 8.

^∥GCS, Galsgow Coma Scale; n missing in blunt injury = 205; n missing in penetrating injury = 80.