Table 1.
Baseline characteristics by post-injury surgical intervention status in 538 patients with physical injuries.
| All patients (N = 538) | Received surgery (N = 268) | Not received surgery (N = 270) | Statistical coefficients | P-valuea | |
|---|---|---|---|---|---|
| Socio-demographic characteristics | |||||
| Age, mean (SD) years | 57.0 (16.9) | 56.3 (17.1) | 57.8 (16.8) | t=-1.020 | 0.308 |
| Sex, N (%) female | 169 (31.4) | 94 (35.1) | 75 (27.8) | χ2 = 3.324 | 0.068 |
| Education, mean (SD) years | 10.7 (4.2) | 10.7 (4.3) | 10.7 (4.2) | t = + 0.003 | 0.997 |
| Marital status, N (%) unmarried | 178 (33.1) | 82 (30.6) | 96 (35.6) | χ2 = 1.494 | 0.222 |
| Living alone, N (%) | 79 (14.7) | 36 (13.4) | 43 (15.9) | χ2 = 0.667 | 0.414 |
| Unemployed status, N (%) | 88 (16.4) | 50 (18.7) | 38 (14.1) | χ2 = 2.065 | 0.151 |
| Pre-trauma characteristics | |||||
| Previous psychiatric disorders, N (%) | 41 (7.6) | 19 (7.1) | 22 (8.1) | χ2 = 0.214 | 0.644 |
| Previous traumatic events, N (%) | 29 (5.4) | 13 (4.9) | 16 (5.9) | χ2 = 0.305 | 0.581 |
| Any childhood abuse, N (%) | 37 (6.9) | 22 (8.2) | 15 (5.6) | χ2 = 1.479 | 0.224 |
| Physical disorders, mean (SD) numbers | 2.0 (2.1) | 1.9 (2.0) | 2.1 (2.1) | t=-1.303 | 0.193 |
| Current smoker, N (%) | 140 (26.0) | 75 (28.0) | 65 (24.1) | χ2 = 1.069 | 0.301 |
| AUDIT, mean (SD) scores | 10.2 (10.0) | 10.5 (10.2) | 9.9 (9.8) | t = + 0.641 | 0.522 |
| Body mass index, mean (SD) | 23.6 (3.5) | 23.6 (3.4) | 23.7 (3.6) | t=-0.267 | 0.789 |
| Trauma related characteristics | |||||
| Injury type, N (%) intentional | 51 (9.5) | 23 (8.6) | 28 (10.4) | χ2 = 0.501 | 0.479 |
| Injury severity score, mean (SD) scores | 14.0 (5.3) | 13.8 (5.7) | 14.2 (4.7) | t=-0.812 | 0.417 |
| Glasgow coma scale, mean (SD) scores | 14.9 (0.6) | 14.9 (0.5) | 14.9 (0.6) | t = + 0.565 | 0.572 |
| Peri-trauma assessment scales and measurements, mean (SD) | |||||
| HAMA | 4.7 (4.7) | 5.0 (4.7) | 4.4 (4.6) | t = + 1.438 | 0.151 |
| HAMD | 6.3 (5.4) | 6.8 (5.5) | 5.8 (5.3) | t = + 2.025 | 0.043 |
| Systolic blood pressure, mmHg | 119.1 (14.1) | 118.3 (13.5) | 120.0 (14.7) | t=-1.374 | 0.170 |
| Diastolic blood pressure, mmHg | 71.9 (9.2) | 71.4 (9.0) | 72.4 (9.3) | t=-1.298 | 0.195 |
| Heart rate per minute | 78.7 (11.1) | 78.7 (11.5) | 78.6 (10.6) | t = + 0.106 | 0.915 |
AUDIT alcohol use disorders identification test, HAMA Hamilton anxiety rating scale, HAMD Hamilton depression rating scale.
a t-tests or χ2 tests, as appropriate between patients who received surgical intervention and those who did not. Bold style indicates statistical significance (P < 0.05).