TABLE 4.

Kappa Statistics Between Readers

Reader	Kappa	95% CI		P	Strength of Agreement
1 and 2	0.156	0.0481	0.2633	0.0015	Slight
1 and 3	0.283	0.1757	0.3894	<0.0001	Fair
2 and 3	0.557	0.4596	0.6544	<0.0001	Moderate

The following is general Kappa interpretation <0 poor, 0.0–0.20 slight, 0.21–0.4 fair, 0.41–0.6 moderate, 0.61–0.8 substantial, and 0.81–1 almost perfect.