Table 3.

Agreement analysis by Cohen’s k test

Institution	Type of lesion	N	%	Agreement (%)	κ	95% CI (κ)	p
University of Genoa  (Center A)	All	434	100	97.7	0.954	0.86–1.0	< 0.0001
	Untreated	284	65.4	97.5	0.949	0.833–1.0	< 0.0001
	Previous biopsy/surgery/RT	150	34.6	98.0	0.945	0.785–1.0	< 0.0001
University of Brescia  (Center B)	All	273	100	94.9	0.872	0.754–0.991	< 0.0001
	Untreated	194	71.1	94.3	0.864	0.723–1.0	< 0.0001
	Previous biopsy/surgery/RT	79	28.9	96.2	0.894	0.674–1.0	< 0.0001