Table 4. The Predicted Tumor Risk Category Results (Number of Patients).

Mitotic Index	Training Cohort (n = 108)		Validation Cohort (n = 20)		Test Cohort (n = 20)
	Low-Mitotic	High-Mitotic	Low-Mitotic	High-Mitotic	Low-Mitotic	High-Mitotic
True	50	50	7	9	8	10
False	4	4	3	1	2	0
Total	54	54	10	10	10	10
Accuracy (95% CI), %	92.6 (0.876–0.976)		80.0 (0.608–0.992)		90.0 (0.756–1.000)
Sensitivity (95% CI), %	92.6 (0.813–0.986)		90.0 (0.541–0.995)		100.0 (0.656–1.000)
Specificity (95% CI), %	92.6 (0.813–0.986)		70.0 (0.354–0.919)		80.0 (0.442–0.965)
Positive predictive value (95% CI), %	92.6 (0.813–0.986)		75.0 (0.428–0.933)		83.3 (0.509–0.971)
Negative predictive value (95% CI), %	92.6 (0.813–0.986)		87.5 (0.467–0.993)		100.0 (0.598–1.000)