Table 1 Baseline characteristics
| Â | ASDH left | ASDH right | P value |
|---|---|---|---|
Sex N (%) | 0.68 | ||
 Male | 50 (56) | 51 (53) |  |
 Female | 40 (44) | 46 (47) |  |
 Missing | 0 (0) | 0 (0) |  |
Age at time of trauma (years) | 0.84 | ||
 Median | 68 | 68 |  |
 IQR. | 53-77 | 55-76 |  |
 Missing (%) | 0 | 0 |  |
Diabetes mellitus N (%) | 0.27 | ||
 No | 74 (82) | 86 (89) |  |
 Yes | 14 (16) | 10 (10) |  |
 Missing | 2 (2) | 1 (1) |  |
Cardiovascular disease N (%) | 0.61 | ||
 No | 37 (41) | 44 (45) |  |
 Yes | 51 (57) | 52 (54) |  |
 Missing | 2 (2) | 1 (1) |  |
Use of anti-coagulants or thrombocytes inhibitors N (%) | 0.72 | ||
 No | 50 (56) | 54 (56) |  |
 Anti-coagulants | 20 (22) | 25 (26) |  |
 Thrombocyte’s inhibitors | 17 (19) | 13 (13) |  |
 Both | 3 (3) | 2 (2) |  |
 Missing | 0 (0) | 3 (3) |  |
Focal neurological symptoms N (%) | 0.73 | ||
 No | 35 (39) | 36 (37) |  |
 Yes | 32 (36) | 37 (38) |  |
 Missing | 23 (26) | 24 (25) |  |
Pupillary light reflex N (%) | 0.79 | ||
 No | 66 (73) | 63 (65) |  |
 One absent | 11 (12) | 14 (14) |  |
 Two absent | 12 (13) | 11 (11) |  |
 Missing | 1 (1) | 9 (9) |  |
Initial GCS | 0.24 | ||
 Median | 9 | 11 |  |
 IQR | 6-13 | 6-15 |  |
 Missing (%) | 4 | 1 |  |
M score | 0.13 | ||
 Median | 5 | 6 |  |
 IQR | 4-6 | 5-6 |  |
 Missing (%) | 32 | 28 |  |
Severity GCS N (%) | 0.54 | ||
 Mild | 28 (31) | 38 (39) |  |
 Moderate | 19 (21) | 19 (20) |  |
 Severe | 41 (46) | 39 (40) |  |
 Missing | 2 (2) | 1 (1) |  |
Thickness of ASDH (mm) | 0.57 | ||
 Median | 13 | 12 |  |
 IQR | 8-17 | 8-16 |  |
 Missing (%) | 4 | 7 |  |
MLS (mm) | 0.45 | ||
 Median | 11 | 10 |  |
 N | 86 | 93 |  |
 IQR | 5-16 | 5-14 |  |
 Missing (%) | 4 | 4 |  |
Other lesion N (%) | 0.43 | ||
 No | 45 (50) | 44 (45) |  |
 Yes | 42 (47) | 52 (54) |  |
 Missing | 3 (3) | 1 (1) |  |
Concomitant contusion N (%) | 0.80 | ||
 No | 64 (71) | 73 (75) |  |
 Yes | 22 (24) | 23 (24) |  |
 Missing | 4 (4) | 1 (1) |  |
Treatment N (%) | 0.27 | ||
 Conservative | 18 (20) | 26 (27) |  |
 Surgery | 72 (80) | 71 (73) |  |
 Missing | 0 (0) | 0 (0) |  |
Primary surgical treatment N (%) | 0.39 | ||
 Craniotomy | 39 (43) | 44 (45) |  |
 Decompressive craniectomy | 32 (36) | 26 (27) |  |
 Burrhole | 1 (1) | 1 (1) |  |
 Missing | 0 (0) | 0 (0) |  |
Predicted unfavourable outcome based on CRASH-CT variables (%) | 0.89 | ||
 Median | 55 | 56 |  |
 IQR | 41-75 | 41-73 |  |
Predicted mortality based on CRASH-CT variables (%) | 0.65 | ||
 Median | 37 | 30 |  |
 IQR | 17-56 | 19-55 |  |