Table 2.

Questionnaire distribution.

	Questionnaire	Publication no.	Ratio (%)
1	Addiction Severity Index	492	16.44
2	Quality of Life	150	5.01
3	Beck Depression Inventory	97	3.24
4	Addiction Research Center Inventory	84	2.81
5	Profile of Mood States	33	1.10
6	Craving Questionnaire	23	0.77
7	Brief Symptom Inventory	21	0.70
8	General Health Questionnaire	18	0.60
9	Severity of Dependence Scale	18	0.60
10	Brief Pain Inventory	18	0.60
11	Minnesota Multiphasic Personality Inventory	15	0.50
12	Short Opiate Withdrawal Scale	13	0.43
13	Opiate Treatment Index	13	0.43
14	SF-36	12	0.40
15	Young Mania Rating Scale	11	0.37
16	Hospital Anxiety and Depression Scale	11	0.37
17	Pittsburgh Sleep Quality Index	11	0.37
18	Neuropsychiatric Inventory	11	0.37
19	Temperament and Character Inventory	10	0.33
20	State-Trait Anxiety Inventory	10	0.33
21	Mini International Neuropsychiatric Interview	10	0.33
22	Childhood Trauma Questionnaire	10	0.33