Table 1.

Descriptive statistics

	%	Mean of those reporting use	Std. dev.
Readiness ruler values
Alcohol	53%	3.6	3.6
Cannabis	69%	3.9	3.3
Benzodiazepines	37%	5.5	3.5
Cocaine	59%	6.7	3.5
Amphetamine	13%	7.6	3.7
Heroin	79%	8.2	2.4
Methadone	86%	3.7	3.4
Other opiates	11%	7.8	3.3
"Party" drugs (e.g., MDMA)	8%	6.4	5.1
Tobacco	95%	1.7	1.9
Proportion of illicit drugs in which change is considered		70%	30%
EuropASI-scores		Mean of all subjects	Std. dev.
Medical		0.31	0.39
Financial		0.92	0.20
Work		0.18	0.34
Alcohol		0.10	0.18
Drugs		0.35	0.12
Legal		0.25	0.33
Family		0.16	0.29
Interpersonal		0.30	0.32
Psychiatric		0.17	0.22

Notes: N for the mean values of the RR varies, since subjects who did not report current use of a substance did not report readiness to change.