Table 2.

Random Forest classifier statistics.

classifier	Accuracy	TPR	FPR	PPV
Group Assignment	0.83	0.73	0.08	0.90
Substance Use: smokers vs. non-smokers	0.58	0.82	0.67	0.55
Substance Use smokers vs. Healthy Control non-smokers	0.81	0.73	0.11	0.87
Substance Use alcohol vs. Healthy Control non-alcohol	0.75	0.92	0.43	0.68

TPR - true positive rate.

FPR - false positive rate.

PPV - positive predictive value.

PPV - positive predictive value.