Table 3.

Classifier accuracy metrics weighted average and by class in both the training and external test cohorts.

Cohort	Class	TP rate	FP rate	Precision	Recall	F-score	ROC	PRC
Training	ACT	0.836	0.218	0.793	0.836	0.814	0.891	0.876
	CS	0.782	0.164	0.827	0.782	0.804	0.891	0.915
	WA	0.809	0.191	0.810	0.809	0.809	0.891	0.895
External test	ACT	0.813	0.300	0.684	0.813	0.743	0.784	0.661
	CS	0.700	0.188	0.824	0.700	0.757	0.784	0.857
	WA	0.750	0.238	0.762	0.750	0.751	0.784	0.770

ACT, atypical cartilaginous tumour; CS, higher-grade chondrosarcoma; FP, false positive; PRC, precision-recall curve; ROC, receiver operator curve; TP, true positive; WA, weighted average.