. Author manuscript; available in PMC: 2016 Nov 1.

Published in final edited form as: Addiction. 2015 Nov;110(11):1777–1790. doi: 10.1111/add.12993

Table 4.

Past 30-Day Use of Highest Scoring Drug (HSD^a) at Follow-up as a Function of Drug Type

	Number of Drug Use Days, Past 30 Days, at Follow- up
HSD Drug Type	Control Group mean^b (n)	Intervention Group mean^b (n)	Group Difference	95% CI
Cannabis	11.72 (68)	9.22 (69)	2.51	-0.34, 5.35
Cocaine/Crack	6.16 (20)	3.39 (30)	2.77	-0.08, 5.63
Methamphetamine/Amphetamine-Type Stimulants	6.86 (14)	6.85 (14)	0.01	-7.57, 7.58
Sedatives	9.40 (16)	5.20 (8)	4.19	-2.92, 11.31
Opiates	11.63 (12)	3.81 (8)	7.82	-0.44, 16.08

Highest scoring drug in problem range (4–26) on WHO ASSIST

Adjusted for baseline HSD use (NOTE: due to small sample sizes none of these results are significant, so no p values are shown)HKVB