Variables | Recurrence | No recurrence | P Value |
---|---|---|---|
Patients | 60(%) | 388(%) | Â |
Gender | 0.057 | ||
 Male | 53 (88.3) | 301 (77.6) |  |
 Female | 7 (11.7) | 87 (22.4) |  |
Age (years) | 0.576 | ||
  < 70 | 30 (50) | 209 (53.9) |  |
  ≥ 70 | 30 (50) | 179 (46.1) |  |
Head trauma event | 35 (58.3) | 260 (67.0) | 0.187 |
Medical history | |||
 Hypertension | 25 (41.7) | 147 (37.9) | 0.575 |
 Diabetes | 10 (16.7) | 49 (12.6) | 0.389 |
 Heart disease | 10 (16.7) | 37 (9.5) | 0.093 |
 Cerebral infarction | 5 (8.3) | 23 (5.9) | 0.404 |
 Renal failure dialysis | 1 (1.7) | 2 (0.5) | 0.351 |
Antiplatelet or anticoagulant drugs | |||
 Antiplatelet drugs | 6 (10.0) | 26 (6.7) | 0.415 |
 Anticoagulant drugs | 5 (8.3) | 10 (2.6) | 0.038 |
The main symptoms | |||
 Headache | 26 (43.3) | 176 (45.4) | 0.769 |
 Dizziness | 17 (28.3) | 122 (31.4) | 0.628 |
 Motor weakness | 32 (53.3) | 221 (57.0) | 0.598 |
 Nausea/vomiting | 2 (3.3) | 29 (7.5) | 0.408 |
 Speech impairment | 3 (5.0) | 14 (3.6) | 0.486 |
 Unsteady gait | 2 (3.3) | 6 (1.5) | 0.292 |
 Incontinence | 1 (1.7) | 10 (2.6) | 1.000 |
 Memory decline | 1 (1.7) | 13 (3.4) | 0.704 |
GCS at admission | 0.566 | ||
 15 | 53 (88.3) | 332 (85.6) |  |
 3–14 | 7 (11.7) | 56 (14.4) |  |
Operation side | P < 0.001 | ||
 Unilateral hematoma | 26 (43.3) | 270 (69.6) |  |
 Bilateral hematoma | 34 (56.7) | 118 (30.4) |  |
Radiological characteristics | |||
 Midline shift | 0.975 | ||
   < 10 mm | 39 (65.0) | 253 (65.2) |  |
   ≥ 10 mm | 21 (35.0) | 135 (34.8) |  |
Preoperative maximal thickness | 0.154 | ||
   < 20 mm | 9 (15.0) | 90 (23.2) |  |
   ≥ 20 mm | 51 (85.0) | 298 (76.8) |  |
 Hematoma density | 0.009 | ||
  Hyper-dense | 29 (48.3) | 104 (26.8) |  |
  Hypo-dense | 7 (11.7) | 64 (16.5) |  |
  Mixed density | 21 (35.0) | 189 (48.7) |  |
  Iso-dense | 3 (5.0) | 31 (8.0) |  |
Treatment | |||
 Atorvastatin perioperatively | 31 (51.7) | 140 (36.1) | 0.021 |
 Anesthesia | 0.982 | ||
  Local | 27 (45.0) | 174 (44.8) |  |
  General | 33 (55.0) | 214 (55.2) |  |
  Intraoperative irrigation | 49 (81.7) | 327 (84.3) | 0.608 |
  Injection urokinase after operation | 3 (5.0) | 9 (2.3) | 0.208 |
 Duration of drainage, day | 0.842 | ||
  1 | 9 (15.0) | 54 (14.0) |  |
  2 | 42 (70.0) | 264 (68.0) |  |
   ≥ 3 | 9 (15.0) | 70 (18.0) |  |
Complications | |||
 Fever | 5 (8.3) | 64 (16.5) | 0.103 |
 Irritability | 4 (6.7) | 15 (3.9) | 0.303 |
 Poor wound healing | 1 (1.7) | 0 | – |
 Seizure | 1 (1.7) | 1 (0.26) | 0.250 |
 Deep vein thrombosis | 0 | 1 (0.26) | – |
 AIH | 0 | 23 (5.9) | – |
Hospitalization time, mean ± SD, days | 14.0 ± 6.4 | 14.0 ± 5.4 | 0.905 |