Table 3.

Classification of MPH Response (Stage 4)

Support Vector Machine			J48
	Classification (no.)			Classification (no.)
	Positive	Negative		Positive	Negative
Response (+)	41	7	Response (+)	39	9
Response (-)	5	25	Response (-)	15	15
Random Forest			Logistic Ridge Regression
	Classification (no.)			Classification (no.)
	Positive	Negative		Positive	Negative
Response (+)	38	10	Response (+)	39	9
Response (-)	11	19	Response (-)	9	21

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.

Response (+), good responder; Response (-), poor responder