Table 3. Concordance rate of each observer for scoring Mitotic Activity Index (MAI) using WSI and conventional microscopy.

		Observer 1	Observer 2	Observer 3	Total
Mitotic scores estimation	Digitally underestimated*	11	15	17	43
	Digitally overestimated*	10	6	14	30
	Same scores digitally and microscopically	79	79	69	227

Per observer, digital mitotic scores have been compared with the gold standard (the conventional mitotic scores) and assessed as under- or overestimated. This assessment is general and includes all scores categories, thus scores1, 2 and 3.