Table 1.
Differences between with no IOBB group and the IOBB group in the development cohort.
| Characteristic | No IOBB (n=551) | IOBB (n=93) | P |
|---|---|---|---|
| Gender (male) | 431 (78.2%) | 74 (79.6%) | 1.000 |
| Age | 58 (49, 67) | 48 (31, 60) | <0.001 |
| GCS grade | <0.001 | ||
| Mild (13–15 score) | 44 (8%) | 0 (0%) | |
| Moderate (9–12 score) | 76 (13.8%) | 0 (0%) | |
| Severe (3–8 score) | 431 (78.2%) | 93 (100%) | |
| Mechanism of injury | 0.080 | ||
| Car accident | 343 (62.3%) | 68 (73.1%) | |
| High fall injury | 181 (32.8%) | 20 (21.5%) | |
| Other | 27 (4.9%) | 5 (5.4%) | |
| Coagulation dysfunction | 75 (13.6%) | 15 (16.1%) | 0.627 |
| Pupil diffusion | <0.001 | ||
| No | 248 (45%) | 11 (11.8%) | |
| Unilateral | 197 (35.8%) | 40 (43%) | |
| Bilateral | 106 (19.2%) | 42 (45.2%) | |
| The way of DC | 1.000 | ||
| Unilateral | 478 (86.8%) | 81 (87.1%) | |
| Bilateral | 73 (13.2%) | 12 (12.9%) | |
| Method of operation | 0.616 | ||
| Direct decompression | 493 (89.5%) | 76 (81.7%) | |
| Progressive decompression | 58 (10.5%) | 17 (18.3%) | |
| Internal decompression | 0 (0%) | 8 (8.6%) | <0.001 |
| Preoperative time (hour) | 5.50 (4.50, 7.00) | 5.30 (4.00, 6.50) | 0.876 |
| Operative time (hour) | 2.83 (2.25, 3.58) | 2.58 (2.08, 3.33) | 0.335 |
| Blood glucose | 10.2 (8.70, 12.43) | 11.3 (8.86, 14.77) | 0.008 |
| Death | 107 (19.4%) | 76 (81.7%) | <0.001 |
DC, decompressive craniectomy; GCS, Glasgow Coma Score; IOBB, intraoperative brain bulge.