Table 4.

Measurement of Agreement of Three Readers, According to Cohen's κ for Normal Retinas, Abnormal Retinas, and Sight-Threatening Eye Diseases

Comparison	κ Class	κ	SE	95% CI
Grader 1 vs. grader 2	Unweighted	0.61	0.058	0.50–0.73
	Linear weighted	0.69	0.048	0.60–0.79
Grader 1 vs. grader 3	Unweighted	0.74	0.056	0.67–0.85
	Linear weighted	0.79	0.047	0.70–0.88
Grader 2 vs. grader 3	Unweighted	0.62	0.068	0.49–0.76
	Linear weighted	0.69	0.059	0.57–0.80