Table 1 Baseline characteristics of 40 patients with DSM-IV opioid dependence randomly assigned to receive baclofen or placebo.

Age (years)

35.1

10.9

31.8

6.5

Age of onset of opioid use

23.2

6.2

21.0

4.9

Duration of opioid use (years)

8.8

6.2

7.0

4.9

Number of previous abstinences

3.7

2.2

2.2

1.9

Duration of the longest previous abstinence (months)

4.4

5.5

4.1

5.6

Income per month (Rials/10000)

81.7

69.3

99.5

103.7

N

%

N

%

Sex (male)

20

100

20

100

Married

14

70

10

50

College education

2

10

2

10

Employed

14

70

10

50

Substance use in patient's family

13

65

17

85

Type of opioid

   Heroin

7

35

6

30

   Opium

13

65

14

70

Route of opioid use

   Inhalation or ingestion

12

60

10

50

   Injection or multiple routes

8

40

10

50

Psychiatric illness

5

25

8

40

Medical illness

1

5

0

0