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.