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Table 2 Inter-rater reliability for symptoms, diagnostic procedures, treatment and stroke subtype

From: Inter-rater reliability of a national acute stroke register

  N Obs.agr. (%)a Kappa (95 % CI) AC1 (95 % CI)
Symptoms at admission
 Hemiparesis face 108 79.6 0.64 (0.51–0.77) 0.72 (0.61–0.83)
 Hemiparesis legs 110 73.6 0.54 (0.41–0.68) 0.63 (0.51–0.75)
 Hemiparesis arms 109 80.0 0.62 (0.49–0.75) 0.73 (0.62–0.83)
 Speech problems 107 72.9 0.52 (0.37–0.66) 0.62 (0.50–0.75)
 Other focal symptoms 111 62.2 0.37 (0.22–0.53) 0.46 (0.33–0.59)
 Symptoms at right/left side 111 79.3 0.69 (0.58–0.79) 0.73 (0.64–0.84)
 Level of consciousnessb 109 95.8 0.66 (0.47–0.85) 0.93 (0.89–0.98)
Diagnostic imaging and examinations
 CT/MRI <24 h after admission 110 97.3 0.69 (0.39–0.99) 0.97 (0.94–1.00)
 Imaging of the stroke 109 87.2 0.77 (0.66–0.87) 0.84 (0.76–0.92)
 Imaging of intracranial vessels 110 91.0 0.56 (0.33–0.79) 0.90 (0.85–0.96)
 Imaging of extracranial vessels 110 83.6 0.71 (0.59–0.83) 0.82 (0.74–0.90)
 Imaging of the heart 111 89.2 0.68 (0.52–0.85) 0.88 (0.82–0.95)
 Heart rate monitoring 111 52.2 0.17 (0.03–0.31) 0.46 (0.35–0.57)
Treatment and diagnosis
 Anticoagulants as treatment 111 88.3 0.34 (0.04–0.60) 0.87 (0.80–0.94)
 Anticoagulants as prophylaxis 111 86.5 0.56 (0.36–0.76) 0.84 (0.76–0.92)
 Swallowing test performed 111 48.6 0.19 (0.09–0.30) 0.27 (0.12–0.43)
 Mobilized out of bed <24 h 110 21.8 0.04 (0.00–0.09) −0.11 (0.00–0.01)
 Stroke subtype 111 99.1 0.97 (0.90–1.00) 0.99 (0.97–1.00)
  1. aObserved agreement calculated as concordant answers divided by N
  2. bOrdinal data, estimate based on Cohen’s quadratic weighted kappa and Gwet’s AC2