Table 4.

Pairwise interobserver agreement for the results of PR staining according to the kappa statistic

Observer	Observer
	2	3	4	5	6	7	8
1	0.804	0.844	0.565	0.594	0.713	0.739	0.854
2		0.680	0.543	0.595	0.690	0.772	0.770
3			0.491	0.554	0.669	0.688	0.846
4				0.747	0.806	0.695	0.504
5					0.725	0.761	0.536
6						0.908	0.652
7							0.704