Table 3 Comparison of persons who had used opioids assessed for OST, divided into two groups regarding substances used, for how long, risky behaviour, and previous treatments, based on ASI interviews

Substances used, %

(a)

 Alcohol over threshold

80/45

78.8

84.4

.438

 Heroin

80/45

96.3

64.4

<.001**

 Methadone

78/45

78.2

66.7

.160

 Other opiates/analgesics

80/46

97.5

100

.280

 Medicines/pills (sedatives)

80/46

91.3

91.3

.992

 Cocaine

78/45

71.8

51.1

.021

 Amphetamines

80/45

92.5

91.3

.811

 Cannabis

80/45

92.5

77.8

.018

 Hallucinogens

77/44

72.7

56.8

.074

 Inhalants

77/44

42.9

31.8

.231

 Other

76/42

57.9

57.1

.937

Hazardous use

 Multiple substances, %

75/43

94.7

90.7

.387

 Injection, %

81/46

90.1

73.9

.016

 Overdoses, m (sd)

77/44

5.0 (6.6)

3.1 (5.8)

.219 (b)

Duration of use, years, m (sd)

(b)

 Alcohol over threshold

61/36

8.3 (9.6)

7.0 (8.3)

.158

 Heroin

72/23

8.6 (7.8)

1.7 (3.1)

<.001**

 Methadone

48/23

2.3 (5.0)

1.2 (2.5)

.245

 Other opiates/analgesics

72/39

8.9 (8.1)

10.7 (9.5)

.164

 Medicine/pills (sedatives)

68/37

9.0 (9.2)

9.0 (8.0)

.245

 Amphetamines

66/35

9.0 (9.3)

4.8 (4.8)

.004**

 Cannabis

66/33

11.5 (9.7)

6.3 (5.3)

.001**

 Hallucinogens

45/20

0.6 (1.1)

1.0 (2.6)

.475

 Inhalation

27/12

1.2 (2.2)

0.3 (0.6)

.093

 Others

33/20

0.9 (1.7)

2.9 (6.3)

.188

 Multiple substances

66/34

12.4 (8.9)

9.7 (8.5)

.598

 Injection

67/29

11.4 (9.4)

7.8 (8.9)

.806

Treatments, m (sd)

 Alcohol problems

80/45

9.3 (46.8)

5.1 (12.8

.226

 Alcohol detox

73/43

4.1 (17.1)

2.5 (6.3)

.159

 Drug problems

80/40

14.7 (45.1)

9.7 (11.7)

.426

 Drug detox

73/42

6.4 (13.2)

6.3.(7.8)

.785