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American Journal of Neuroradiology

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Interrater reliability regarding graduation and treatment decisions of vasospasm on CT

	Interrater Reliability (95% CI)
	All Raters (n = 3)	Senior (n = 2)
First rating (CTA)
Detection of severe vasospasm in any arterial segment (>50% narrowing)	0.27 (0.11–0.42) 0.27 (0.11–0.43)^a	0.28 (0.10–0.46) 0.21 (−0.02–0.44)^a
Endovascular treatment?	0.23 (0.06–0.39) 0.23 (0.07–0.39)^a	0.23 (−0.01–0.46) 0.23 (−0.01–0.46)^a
Second rating (CTA + CTP)
Detection of severe vasospasm in any arterial segment (>50% narrowing)	0.31 (0.15–0.46) 0.31 (0.15–0.46)^a	0.46 (0.26–0.66) 0.46 (0.25–0.68)^a
Endovascular treatment?	0.47 (0.30–0.64) 0.50 (0.35–0.66)^a	0.73 (0.55–0.91) 0.77 (0.62–0.93)^a
Perfusion deficit?	0.77 (0.63–0.91) 0.83 (0.73–0.94)^a	0.82 (0.66–0.97) 0.86 (0.74–0.98)^a

↵a Prevalence-adjusted and bias-adjusted κ coefficients. Note that the values were highly comparable with the results presented in the published article.