Table 1:

κ statistics for agreement (ranges of 4 observers versus the study NR)

	Reading 1 vs 2	Reading 1 vs Study NR	Reading 2 vs Study NR
Acute hypoattenuation	0.30–0.48	0.14–0.34	0.32–0.38
HMCA	0.56–0.81	0.48–0.63	0.59–0.70

Note:—NR indicates neuroradiologist; HCMA, hyperattenuated middle cerebral artery.