Table 2.
Differences between with no IOBB group and the IOBB group based on imaging features in the development cohort.
| Characteristic | No IOBB (n=551) | IOBB (n=93) | P |
|---|---|---|---|
| Brain contusion | 186 (33.8%) | 74 (79.6%) | <0.001 |
| Site of contusion | 0.218 | ||
| No | 148 (26.9%) | 28 (30.1%) | |
| Frontal lobe | 195 (35.4%) | 28 (30.1%) | |
| Temporal lobe | 176 (31.9%) | 30 (32.3%) | |
| Parietal lobe | 6 (1.1%) | 0 (0%) | |
| Occipital lobe | 18 (3.3%) | 7 (7.5%) | |
| Other | 8 (1.5%) | 0 (0%) | |
| Lesion side | <0.001 | ||
| Unilateral | 538 (97.6%) | 54 (58.1%) | |
| Bilateral | 13 (2.4%) | 39 (41.9%) | |
| Contralateral fracture | 93 (16.9%) | 59 (63.4%) | <0.001 |
| Midline shift | <0.001 | ||
| ＜5 mm | 126 (22.9%) | 15 (16.1%) | |
| 5.1–10 mm | 192 (34.8%) | 21 (22.6%) | |
| 10.1–15 mm | 166 (30.1%) | 22 (23.7%) | |
| ＞15 mm | 67 (12.2%) | 35 (37.6%) | |
| Basal pool | <0.001 | ||
| Normal | 99 (18%) | 7 (7.5%) | |
| Compression | 435 (78.9%) | 58 (62.4%) | |
| Disappear | 17 (3.1%) | 28 (30.1%) | |
| Multiple hematoma | 392 (71.1%) | 65 (69.9%) | 0.903 |
| IVH | 28 (5.1%) | 8 (8.6%) | 0.261 |
| SAH | 413 (75%) | 76 (81.7%) | 0.200 |
| SDH | 385 (69.9%) | 92 (98.9%) | <0.001 |
| EDH | 162 (29.4%) | 11 (11.8%) | <0.001 |
| CT value | |||
| TH | 50 (45, 54) | 55 (50, 58) | <0.001 |
| SSS | 43 (36, 49) | 49 (43, 52) | <0.001 |
| HLTS | 41 (34, 47) | 43 (42, 49) | <0.001 |
| DLTS | 47 (44, 52) | 57 (50, 60) | <0.001 |
CT, computed tomography; DLTS, diseased lateral transverse sinus; EDH, extradural hemorrhage; HLTS, healthy lateral transverse sinus; IOBB, intraoperative brain bulge; IVH, intraventricular hemorrhage; SAH, subarachnoid hemorrhage; SDH, subdural hemorrhage; SSS, superior sagittal sinus; TH, torcular herophili.