Substance use: 8. Average scores (OTI, high = poor) (skewed data)
Study	Intervention	Time period	Mean	SD	N
Alcohol
Baker 2002	Treatment	3 months	2.55	5.29	28
Baker 2002	Control		1.51	2.05	23
Baker 2002	Treatment	6 months	4.26	6.59	28
Baker 2002	Control		4.19	7.74	23
Baker 2002	Treatment	12 months	2.98	3.11	28
Baker 2002			1.83	3.54	23
Amphetamine
Baker 2002	Treatment	3 months	0.32	1.05	11
Baker 2002	Control		0.01	0.03	8
Baker 2002	Treatment	6 months	0.14	0.31	11
Baker 2002	Control		0.17	0.35	8
Baker 2002	Treatment	12 months	0.06	0.17	11
Baker 2002			0.03	0.05	8
Cannabis
Baker 2002	Treatment	3 months	2.52	6.10	28
Baker 2002	Control		3.44	4.69	34
Baker 2002	Treatment	6 months	4.77	8.00	28
Baker 2002	Control		3.89	6.22	34
Baker 2002	Treatment	12 months	5.81	7.76	28
Baker 2002			4.47	6.09	34
Polydrug use
Baker 2002	Treatment	3 months	2.74	1.25	43
Baker 2002	Control		2.33	1.15	46
Baker 2002	Treatment	6 months	2.74	1.14	43
Baker 2002	Control		2.52	1.28	46
Baker 2002	Treatment	12 months	2.63	1.22	43
Baker 2002	Control		2.7	1.15	46