Table 4.

Upper: classifier accuracy and expected calibration error for boosting before and after isotonic calibration and Lower: expected calibration error for random forest model before and after isotonic calibration

Data elements	Weighted-F1	ECE	Isotonic weighted-F1	Isotonic ECE
Classification calibration
Gleason grade—primary	0.95	0.03	0.93	0.03
Gleason grade—secondary	0.94	0.08	0.92	0.14
Gleason grade—tertiary	0.91	0.05	0.91	0.03
Tumor histology	0.99	0.009	0.99	0.007
Cribriform pattern	0.995	0.007	0.995	0.017
Treatment effect	0.99	0.007	0.99	0.003
Tumor margin status	0.96	0.15	0.94	0.013
Benign margin status	0.994	0.007	0.995	0.019
Perineural invasion	0.95	0.26	0.96	0.02
Seminal vesicle invasion	0.987	0.16	0.97	0.02
Extraprostatic extension	0.96	0.12	0.96	0.01
Lymph node status	0.96	0.04	0.98	0.01
Data elements	ECE		Isotonic ECE
Extractor calibration
T stage	0.155		0.016
N stage	0.144		0.013
M stage	0.007		0.005
Estimated volume of tumor	0.221		0.021
Prostate weight	0.278		0.033