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Table 3 Interrater agreement

From: Application of NICE or SNC guidelines may reduce the need for computerized tomographies in patients with mild traumatic brain injury: a retrospective chart review and theoretical application of five guidelines

Variable

Cohen’s kappa

Percentage agreement

Bleeding disorder a

–

100

Anticoagulation

1.0

100

Thrombocyte inhibitors

0.947

99

Low molecular-weight heparin a

–

99

Mechanism of injury

0.716

81

High energy according to ATLS

0.385

97

Dangerous mechanism

0.662

94

RLS-85

0.655

92

GCS

0.574

90

Loss of consciousness

0.821

93

Amnesia

0.804

92

Headache

0.760

92

Vomiting

0.884

99

Number of vomits

0.542

96

Seizure a

–

97

Intoxication

0.937

98

Abnormal behavior a

–

91

Abnormal consciousness

0.576

90

Signs of depressed skull fracture

0.521

95

Signs of basal skull fracture a

–

99

Scalp hematoma

0.789

98

Signs of trauma above clavicles

0.807

93

Neurological deficit

0.497

93

Presence of intraventricular shunt

1.0

100

S100B measured

0.801

93

S100B level

0.824

93

CT scan of the head

0.978

99

Intracranial hemorrhage

1.0

100

Skull fracture

0.928

99

Other radiology performed

0.768

92

Intubation a

–

99

Neurosurgical intervention

1.0

100

Death

1.0

100

  1. Abbreviations: ATLS® Advanced Trauma Life Support, RLS-85 Reaction Level Scale 85, GCS Glasgow Coma Scale
  2. aUnable to calculate Cohen’s kappa due to parameter being a constant