Table 3. The Statistical Results at the Patient Level (Number of Patients).

Mitotic Index	Training Cohort (n = 108)		Validation Cohort (n = 20)		Test Cohort (n = 20)
	≤ 5/50 HFPs	> 5/50 HFPs	≤ 5/50 HFPs	> 5/50 HFPs	≤ 5/50 HFPs	> 5/50 HFPs
True	48	50	7	9	7	9
False	6	4	3	1	3	1
Total	54	54	10	10	10	10
Accuracy (95% CI), %	90.7 (0.852–0.963)		80.0 (0.608–0.992)		80.0 (0.608–0.992)
Sensitivity (95% CI), %	92.6 (0.813–0.976)		90.0 (0.541–0.995)		90.0 (0.541–0.995)
Specificity (95% CI), %	88.9 (0.767–0.954)		70.0 (0.354–0.919)		70.0 (0.354–0.919)
Positive predictive value (95% CI), %	88.9 (0.767–0.954)		75.0 (0.428–0.933)		75.0 (0.428–0.933)
Negative predictive value (95% CI), %	92.3 (0.806–0.975)		87.5 (0.467–0.993)		87.5 (0.467–0.993)