Table 3. Rule Based Results.

Evaluation Set	Precision/PPV	Recall/Sensitivity	F1-Measure	Area under ROC Curve
BCH	0.885	0.891 (14)	0.888	0.642
CCHMC	0.840	0.622 (48)	0.715	0.599
Combined	0.866	0.758 (62)	0.808	0.579
CHOP	0.849	0.737 (10)	0.788	0.659
(independent validation on 50 patients)

BCH–Boston Children’s Hospital; CCHMC–Cincinnati Children’s Hospital and Medical Center; CHOP–Children’s Hospital of Philadelphia; PPV–positive predictive value; ROC–Receivers Operator Characteristic.