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