Table 8 Kappa statistics for classification of ductal carcinoma in situ by nuclear grade.

Circulation*	High	Intermediate	Low	Overall
No. of cases†	11	13	4	28
Circulation
952, 961	0.47	0.19	0.41	0.35
962, 971, 972	0.34	0.25	0.09	0.28
981, 982, 991	0.09	0.06	0.19	0.11
992, 001, 002	0.64	0.29	0.30	0.44
All	0.51	0.23	0.31	0.36

*The first 2 digits of each number refer to the year and the 3rd to the circulation number for that year; †number of cases where the diagnosis was made by most members of the national coordinating group.