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.