On the Equivalence of Multirater Kappas Based on 2-Agreement and 3-Agreement with Binary Scores

Table 1

Ratings by 4 pathologists for 30 cases where 1 = Flat Epithelial Atypia and 0 = Not Atypical.

Freq.	Raters
	1	2	3	4
10	1	1	1	1	𝜅(4,2)≈.802479
2	1	0	1	0
2	1	0	0	0	𝜅(4,3)≈.802479
1	0	0	0	1
15	0	0	0	0	𝜅(4,4)≈.802076