Table 1 Baseline statistics (N = 165)

Gender

 Female

12

12%

9

13%

χ²(1) = 0.04

 Male

79

88%

65

87%

Age (median/inter-quartile rage)

30.6/13.8

32.5/12.4

Kruskall-Wallis χ²(1) = 0.40

Number of criteria for conduct disorder satisfied (median/inter-quartile rage)

4(2)

4(2)

Kruskall-Wallis χ²(1) = 0.11

Number of criteria for adult antisocial personality disorder satisfied (median/inter-quartile rage)

5(2)

5(2)

Kruskall-Wallis χ²(1) = 0.19

Medication-assisted treatment at baseline

 No

49

54%

39

53%

χ²(1) = 0.02

 Yes

42

46%

35

47%

Offending (past year)

 Any

44

48%

36

49%

χ²(1) = 0.00

 Violent offending

9

10%

10

14%

χ²(1) = 0.53

 Property offending

28

31%

20

27%

χ²(1) = 0.28

 Serious drug offending

20

22%

11

15%

χ²(1) = 1.35

Psychiatric history (past 10 years, hospital-based contacts)

 Mood or anxiety disorders (F32-F49X)

24

26%

28

38%

χ²(1) = 2.49

 Personality disorders (F6X)

8

11%

12

13%

χ²(1) = 0.22

 Any inpatient care

14

15%

20

27%

χ²(1) = 3.38

Any alcohol-related problems (past 10 years)^a

30

33%

22

30%

χ²(1) = 0.20