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Table 4 Univariate analysis of factors for postoperative AIH

From: Predictors of acute intracranial hemorrhage and recurrence of chronic subdural hematoma following burr hole drainage

VariablesAIHNo AIHP Value
Patients23(%)425(%) 
Gender0.113
 Male15 (65.2)339 (79.8) 
 Female8 (34.8)86 (20.2) 
Age (years)0.908
  < 7012 (52.2)227 (53.4) 
  ≥ 7011 (47.8)198 (46.6) 
Head trauma event14 (60.9)281 (66.1)0.605
Medical history
 Hypertension12 (52.2)160 (37.6)0.163
 Diabetes2 (8.7)57 (13.4)0.754
 Heart disease1 (4.3)46 (10.8)0.494
 Cerebral infarction1 (4.3)27 (6.4)1.00
 Renal failure dialysis0 (0)3 (0.7)
Antiplatelet or anticoagulant drugs
 Antiplatelet drugs3 (13.0)29 (6.8)0.221
 Anticoagulant drugs1 (4.3)14 (3.3)0.552
Preoperative clinical symptoms
 Headache15 (65.2)187 (44.0)0.046
 Dizziness0 (0)139 (32.7)
 Motor weakness14 (60.9)239 (56.2)0.662
 Nausea/vomiting2 (8.7)29 (6.9)0.668
 Speech impairment0 (0)17 (4.0)
 Unsteady gait1 (4.3)7 (1.6)0.346
 Incontinence0 (0)11 (2.6)
 Memory decline0 (0)14 (3.3)
GCS at admission0.756
 1521 (91.3)364 (85.6) 
 3–142 (8.7)61 (14.4) 
Operation side0.683
 Unilateral hematoma16 (69.6)278 (65.4) 
 Bilateral hematoma7 (30.4)147 (34.6) 
Radiological characteristics
 Midline shift0.367
   < 10 mm17 (73.9)275 (64.7) 
   ≥ 10 mm6 (26.1)150 (35.3) 
 Preoperative maximal thickness0.043
   < 20 mm9 (39.1)90 (21.2) 
   ≥ 20 mm14 (60.9)335 (78.8) 
 Hematoma density0.924
  Hyper-dense7 (30.4)126 (29.6) 
  Hypo-dense4 (17.4)67 (15.8) 
  Mixed density10 (43.5)200 (47.1) 
  Iso-dense2 (8.7)32 (7.5) 
Treatment
 Atorvastatin perioperatively9 (39.1)162 (38.1)0.922
 Anesthesia0.249
  Local13 (56.5)188 (44.2) 
  General10 (43.5)237 (55.8) 
  Intraoperative irrigation15 (65.2)361 (84.9)0.020
  Injection urokinase after operation0 (0)12 (2.8)
 Duration of drainage, day0.307
  11 (4.3)62 (14.6) 
  219 (82.7)287 (67.5) 
   ≥ 33 (13.0)76 (17.9) 
  1. GCS Glasgow Coma Scale, AIH Acute intracranial hemorrhage