TABLE 2—
Demographics of Gunshot Wound Patients, by Distance From a Trauma Center: Chicago, IL, 1999–2009
| Variable | Distance ≤ 5 Miles | Distance > 5 Miles | P |
| Total, no. | 6786 | 3543 | |
| Unadjusted mortality | 0.070 | 0.087 | .002a |
| Race/ethnicity, no. | .001b | ||
| White, non-Hispanic | 343 | 86 | |
| Black, non-Hispanic | 4048 | 3013 | |
| Hispanic | 1959 | 279 | |
| Other or unknown | 433 | 165 | |
| Gender, no. (%) | .288b | ||
| Female | 589 (9) | 286 (8) | |
| Male | 6192 (91) | 3257 (92) | |
| Age, y, no. (%) | .029b | ||
| Birth–19 | 2142 (32) | 1027 (29) | |
| 20–39 | 3993 (59) | 2182 (62) | |
| 40–59 | 575 (8) | 289 (8) | |
| ≥ 60 | 73 (1) | 45 (1) | |
| Insurance coverage, no. (%) | .001b | ||
| Insured | 3541 (53) | 1515 (43) | |
| Not insured | 3145 (47) | 1977 (57) | |
| Abbreviated Injury Scale,c no. (%) | .001b | ||
| Head | 486 (13) | 185 (11) | |
| Neck | 79 (2) | 42 (2) | |
| Chest | 621 (16) | 289 (16) | |
| Abdomen | 290 (8) | 222 (13) | |
| Other | 2816 (62) | 1257 (58) | |
| Intent, no. (%) | .001b | ||
| Unintentional | 515 (8) | 124 (3) | |
| Suicide | 62 (1) | 42 (1) | |
| Assault | 6006 (89) | 3316 (94) | |
| Undetermined | 159 (2) | 28 (1) | |
| Legal Intervention | 41 (1) | 33 (1) | |
| SBP, mm Hg, mean | |||
| Overall | 130.7 | 131.1 | .494a |
| Among patients who died | 83.5 | 79.8 | .449 |
| ISS,d mean | |||
| Overall | 9.3 | 10.4 | .001a |
| Among patients who died | 22.7 | 21.6 | .335 |
Note. ISS = injury severity score; SBP = systolic blood pressure. The totals may not add to 100% because of a small amount of missing data.
a
P value determined by the t-test.
b
P value determined by the χ2 test.
c
Based on data from 1999 to 2003; no data from 2004 to 2009 were available.
d
An ISS > 16 is associated with higher likelihood of mortality.