Article Figures & Data
Tables
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.
- Table 2:
κ statistics for agreement (ranges of 4 observers) versus the ASPECTS of an unblinded 3-person concensus panel
Reading 1 vs Panel Reading 2 vs Panel P* Acute hypoattenuation vs ASPECTS < 9 0.07–0.27 0.20–0.41 .01 ASPECTS < 8 0.10–0.35 0.25–0.58 .008 ASPECTS < 7 0.22–0.51 0.42–0.45 .14 Note:—NR indicates neuroradiologist; ASPECTS, Alberta Stroke Program Early CT Score.
* P value for change in agreement from reading 1 to reading 2.
- Table 3:
κ for agreement of the original blinded interpretation of the study NR versus the unblinded ASPECTS designation of the 3-person panel
Comparison κ (CI) Study NR versus ASPECTS < 10 0.25 (0.08–0.43) ASPECTS < 9 0.41 (0.21–0.60) ASPECTS < 8 0.44 (0.24–0.65) ASPECTS < 7 0.51 (0.32–0.70) Note:—NR indicates neuroradiologist; CI, confidence interval; ASPECTS, Alberta Stroke Program Early CT Score.
