Comparison of characteristics of patients with and without PTSD
| Characteristics | No PTSD | PTSD | P value |
| n | 86 | 59 | |
| Age | 37 (26, 55) | 29 (24, 36) | 0.011 |
| Male (%) | 72 | 66 | 0.477 |
| Penetrating (%) | 40 | 60 | 0.0001 |
| Income (%)* | 43 | 71 | 0.001 |
| Education (%)* | 45 | 54 | 0.234 |
| GCS | 15 (15, 15) | 15 (15, 15) | 0.704 |
| ISS | 14 (10, 20) | 17 (10, 22) | 0.376 |
| 24-hour transfusions | 0 (0, 1.5) | 2.5 (0, 5) | 0.027 |
| BE | −3.1 (5.4) | −4.0 (6.5) | 0.371 |
| Lactate | 3.6 (3.5) | 3.7 (3.4) | 0.833 |
| SBP | 127 (27) | 126 (30) | 0.844 |
| HR | 99 (26) | 101 (22) | 0.624 |
| Ventilator days | 0 (0, 1.5) | 2 (0, 4) | 0.191 |
| ICU LOS (days) | 2 (0, 6) | 3 (0, 7) | 0.814 |
| Hospital LOS (days) | 5 (8.5, 17) | 8 (4, 16) | 0.743 |
*Income and education—the most common income level was <US$25,000 annually for both groups and the most common level of education was high school or equivalent for both groups, and these were compared.
BE, base excess; GCS, Glascow Coma Scale; HR, heart rate; ICU, intensive care unit; ISS, injury severity score; LOS, length of stay; PTSD, post-traumatic stress disorder; SBP, systolic blood pressure.