Table 1.

Characteristics of addicts in withdrawal treatment (n = 682)

Variable	Number	Percentage
Gender
Male	656	96
Female	29	4
Total	685a	100
Age
18-24	30	4
25-34	268	39
35-44	214	32
45-54	119	17
55 ≤	51	8
Total	682	100
Education status
0-5	64	10
6-12	436	65
13 ≤	168	25
Total	668	100
Employment status
Full-time job	385	57
Part-time job	133	19
Unemployed	101	15
Others (student, retired, homemaker)	62	9
Total	681	100
Main drug of abuse
Opium	444	65
Crystalline heroin	183	27
Others	52	8
Total	679	100
Age of starting drug abuse (years)
≤ 17	103	15
18-24	311	46
25-34	190	28
35 ≤	73	11
Total	677	100
Duration of addiction (years)
< 1	21	3
1-5	210	31
6-10	205	31
11 ≤	236	35
Total	672	100
Duration of current treatment (months)
< 1	79	12
1-5.9	193	28
6-11.9	149	22
12-23.9	124	18
24 ≤	133	20
Total	678	100

^a Regardless of interview, participants’ gender was recognized based on their appearance.