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Table 5 CT image findings (initial description) and patient management

From: Evaluation of the Scandinavian guidelines for head injuries based on a consecutive series with computed tomography from a Norwegian university hospital

CT findings and management after CT examination Minimal injury Mild injury Moderate injury Missing data or not classifiable Overall
  N = 275 N = 525 N = 160 N = 365 N = 1325
CT findings      
 Normal CT * 218 (79.3%) 423 (80.6%) 88 (55.0%) 241 (66.0%) 970 (73.2%)
 Intracranial traumatic findings 10 (3.6%) 36 (6.9%) 30 (18.8%) 7 (1.9%) 83 (6.3%)
 Epidural hematoma 1 (0.4%) 2 (0.4%) 4 (2.5%) 0 (0%) 7 (0.5%)
 Subdural hematoma 3 (1.1%) 12 (2.3%) 15 (9,4%) 1 (0.3%) 31 (2.3%)
 SAH/intraventricular hemorrhage 2 (0.7%) 12 (2.3%) 12 (7.5%) 3 (0.8%) 29 (2.2%)
 Contusion hematoma 4 (1.5%) 15 (2.9%) 17 (10.6%) 5 (1.4%) 41 (3.1%)
 Diffuse cerebral edema 1 (0.4%) 1 (0.2%) 5 (3.1%) 0 (0%) 7 (0.5%)
 Pneumocephalus 1 (0.4%) 8 (1.5%) 7 (4.4%) 0 (0%) 16 (1.2%)
 Cranial fracture(s) 4 (1.5%) 17 (3.2%) 12 (7.5%) 5 (1.4%) 38 (2.9%)
 With impression 1 (0.4%) 2 (0.4%) 2 (1.3%) 0 (0%) 5 (0.4%)
 Without impression 1 (0.4%) 7 (1.3%) 6 (3.8%) 3 (0.8%) 17 (1.3%)
 Skull base fracture 2 (0.7%) 10 (1.9%) 7 (4.4%) 2 (0.5%) 21 (1.6%)
 Non-traumatic pathological findings 45 (16.4%) 64 (12.2%) 44 (27.5%) 114 (31.2%) 267 (20.2%)
Admission to hospital      
 Number of admissions 188 (68.4%) 285 (54.3%) 120 (75.0%) 196 (53.7%) 789 (59.6%)
 Median length of stay (days) 1.0 0.5 1.5 0.5 0.5
 Range length of stay (days) 0.0 – 52.0 0.0 - 98.0 0.0 - 108.0 0.0 - 60.0 0.0 – 108.0
 Admission to hospital due to:      
 Head injury alone 30 (10.9%) 103 (19.6%) 37 (23.1%) 16 (4.4%) 186 (14.0%)
 Other causes than injuries 3 (1.1%) 7 (1.3%) 7 (4.4%) 68 (18.6%) 85 (6.4%)
 Other injuries than the head injury 86 (31.3%) 35 (6.7%) 6 (3.8%) 16 (4.4%) 143 (10.8%)
 Combinations 68 (24.7%) 140 (26.7%) 70 (43.8%) 95 (26.0%) 373 (28.2%)
 Unknown cause/missing data 1 (0.4%) 0 (0%) 0 (0.0%) 1 (0.3%) 2 (0.2%)
 Not admitted 87 (31.6%) 240 (45.7%) 40 (25.0%) 169 (46.3%) 536 (40.5%)
Neurosurgical intervention 3 (1.1%) 1 (0.2%) 8 (5.0%) 0 (0%) 12 (0.9%)
 Intracranial pressure monitoring 0 (0%) 1 (0.2%) 4 (2.5%) 0 (0%) 5 (0.4%)
 Reposition of cranial fracture(s) 1 (0.4%) 0 (0%) 2 (1.3% 0 (0%) 3 (0.2%)
 External ventricle drain 0 (0%) 0 (0%) 0 (0%) 0 (0%) 0 (0%)
 Craniotomy 1 (0.4%) 0 (0%) 2 (1.3%) 0 (0%) 3 (0.2%)
 Burr hole-procedure§ 1 (0.4%) 0 (0%) 0 (0%) 0 (0%) 1 (0.1%)
In-house-mortality 3 (1.1%) 1 (0.2%) 2 (1.3%) 8 (2.2%) 14 (1.1%)
  1. *Except extra-cranial hematoma or swelling.
  2. § Evacuation of chronic subdural hematoma.