Table 2.

Inter-observer agreement in each observation method (Kappa coefficient)

	Scanner A	Scanner B	Scanner C	Scanner D	Microscope
Observer 1 vs 2	0.677	0.770	0.814	0.815	0.735
Observer 1 vs 3	0.775	0.790	0.872	0.745	0.833
Observer 1 vs 4	0.885	0.788	0.852	0.865	0.779
Observer 1 vs 5	0.864	0.799	0.879	0.820	0.781
Observer 2 vs 3	0.621	0.807	0.834	0.667	0.742
Observer 2 vs 4	0.693	0.763	0.840	0.791	0.723
Observer 2 vs 5	0.699	0.802	0.840	0.786	0.666
Observer 3 vs 4	0.773	0.850	0.818	0.819	0.831
Observer 3 vs 5	0.765	0.862	0.845	0.785	0.789
Observer 4 vs 5	0.886	0.833	0.864	0.905	0.743