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Table 2 Cohen’s kappa for interobserver agreement between sonographers and radiologists

From: Magnetic resonance imaging compared to ultrasonography in giant cell arteritis: a cross-sectional study

Vessel Sonographers Radiologists
Lt axillary 0.94 (95% CI 0.83–1.00) 0.48 (95% CI − 0.12–1.00)
Lt carotid 0.68 (95% CI 0.42–0.94) 0.00 (95% CI 0.00–0.00)
Lt subclavian 1.00 (95% CI 1.00–1.00) 0.43 (95% CI − 0.03–0.90)
Lt temporal 0.94 (95% CI 0.83–1.00) 0.25 (95% CI − 0.03–0.53)
Lt frontal 0.65 (95% CI 0.40–0.90) 0.35 (95% CI 0.01–0.68)
Lt parietal 0.76 (95% CI 0.55–0.98) 0.31 (95% CI −0.03–0.65)
Lt vertebral 0.72 (95% CI 0.36–1.00) Not calculated
Rt axillary 1.00 (95% CI 1.00–1.00) − 0.05 (95% CI − 0.14–0.04)
Rt carotid 0.43 (95% CI 0.13–0.73) 0.65 (95% CI 0.02–1.00)
Rt subclavian 0.82 (95% CI 0.63–1.00) 0.20 (95% CI − 0.26–0.67)
Rt temporal 1.00 (95% CI 1.00–1.00) 0.44 (95% CI 0.14–0.75)
Rt frontal 0.77 (95% CI 0.52–1.00) 0.49 (95% CI 0.19–0.78)
Rt parietal 0.82 (95% CI 0.63–1.00) 0.29 (95% CI 0.02–0.57)
Rt vertebral 1.00 (95% CI 1.00–1.00) Not calculated
Thoracic aorta 0.72 (95% CI 0.35–1.00) 0.00 (95% CI 0.00–0.00)
All vessels 0.84 (95% CI 0.79–0.89) 0.44 (95% CI 0.33–0.54)
  1. NB. Statistics could not be calculated in the left and right vertebral arteries among the radiologists because data was too sparse