Table 2.

Classification Accuracy and Area Under Receiver Operating Characteristic (ROC) Curve (AUC) Performance of the Classifiers for Predicting MPH Response

	Support Vector Machine		J48		Random Forest		Logistic Ridge Regression
	Accuracy	AUC	Accuracy	AUC	Accuracy	AUC	Accuracy	AUC
Stage 1	64.1%	0.55	61.5%	0.51	61.5%	0.58	66.7%	0.61
Stage 2	70.5%	0.69	62.8%	0.56	66.7%	0.59	65.4%	0.65
Stage 3	74.4%	0.69	68.0%	0.55	66.7%	0.64	73.1%	0.70
Stage 4	84.6%	0.84	69.2%	0.61	73.1%	0.79	76.9%	0.73

Abbreviation: MPH, methylphenidate.

Stage 1: demographics.

Stage 2: stage 1 + clinical information.

Stage 3: stage 2 + neuropsychological measures.

Stage 4: stage 3 + genetic/environmental/neuroimaging measures.