Table 2 Sample characteristics at baseline by allocation
| Â | Experimental (n = 142) | Control (n = 138) | Pearson Chi2 or T-value | P | Â | ||
|---|---|---|---|---|---|---|---|
Mean age ± SD,y | 27.4 ± 7.1 | 26.9 ± 6.6 | .59 | .55 | n.s. | ||
Men, n (%) | 120 | (84.5) | 108 | (78.3) | 1.8 | .22 | n.s. |
Country of birth, n (%) | Â | Â | Â | Â | Â | Â | Â |
   Belgium | 131 | (92.3) | 134 | (97.1) | 8.3 | .49 | n.s. |
   Other | 11 | (7.7) | 4 | (2.9) |  |  |  |
Relationship, n (%) | Â | Â | Â | Â | Â | Â | Â |
   Never been Married | 119 | (83.8) | 111 | (80.4) | 3.6 | .61 | n.s. |
Living situation, n(%) | Â | Â | Â | Â | Â | Â | Â |
   Partner & children | 19 | (13.4) | 18 | (13.0) | 9.6 | .30 | n.s. |
   Partner no children | 23 | (16.2) | 31 | (22.5) |  |  |  |
   With parents | 45 | (31.7) | 37 | (26.8) |  |  |  |
   Alone | 35 | (24.6) | 29 | (21.0) |  |  |  |
Educational level, n (%) | Â | Â | Â | Â | Â | Â | Â |
   < = vocational until 2nd degree | 58 | (42.6) | 56 | (42.1) | 7.2 | .62 | n.s. |
   Vocational & 3rd or 4th degree | 37 | (26.1) | 30 | (21.7) |  |  |  |
   Technical secondary | 24 | (16.9) | 20 | (14.5) |  |  |  |
   General Secondary | 8 | (5.6) | 12 | (8.7) |  |  |  |
Employment status, n (%) | Â | Â | Â | Â | Â | Â | Â |
   Employed full-time or part-time | 94 | (68.1) | 90 | (65.2) | 8.8 | .26 | n.s. |
Profession, n(%) | Â | Â | Â | Â | Â | Â | Â |
   Unschooled labour | 71 | (50.0) | 52 | (37.7) | 7.5 | .28 | n.s. |
   Schooled labour | 41 | (28.9) | 45 | (32.6) |  |  |  |
   Other or missing | 30 | (21.1) | 41 | (29.7) |  |  |  |
Primary substance, n (%) | Â | Â | Â | Â | Â | Â | Â |
   Amphetamines | 17 | (12.0) | 12 | (8.7) | 17.4 | .19 | n.s. |
   Cannabis | 38 | (26.8) | 51 | (37.0) |  |  |  |
   Cocaine | 30 | (21.1) | 19 | (13.7) |  |  |  |
   Opiates | 30 | (21.1) | 19 | (13.8) |  |  |  |
Mean years of drug use ± SD |  |  |  |  |  | ||
   Amphetamines | 4.6 ± 5.0 | 3.3 ± 3.1 | 1.8 | .07 | n.s. | ||
   Cannabis | 8.0 ± 5.8 | 7.9 ± 5.4 | .91 | .84 | n.s. | ||
   Cocaine | 3.1 ± 3.7 | 3.1 ± 3.7 | -.10 | .92 | n.s. | ||
   Opiates | 3.8 ± 4.1 | 3.0 ± 2.3 | 1.0 | .30 | n.s. | ||
Mean n of drugs ever used ± SD | 3.9 ± 2.0 | 3.7 ± 1.9 | .98 | .38 | n.s. | ||
Mean n of treatments drugs ± SD | 1.0 ± 1.3 | 0.9 ± 1.3 | .64 | .52 | n.s. | ||
EASI-severity > = 4, n (%) | Â | Â | Â | Â | Â | Â | Â |
   Physical health | 20 | (14.4) | 21 | (15.3) | 4.4 | .82 | n.s. |
   Education, Work, Income | 38 | (28.0) | 45 | (33.9) | 17.0 | .02 | < .05 |
   Alcohol use | 33 | (23.4) | 35 | (25.2) | 6.5 | .60 | n.s. |
   Drug use | 135 | (89.5) | 122 | (88.4) | 10.6 | .06 | n.s. |
   Judicial | 35 | (25.0) | 43 | (11.8) | 11.8 | .11 | n.s. |
   Relations | 78 | (56.5) | 72 | (52.5) | 6.6 | .47 | n.s. |
   Psycho-emotional | 71 | (51.4) | 72 | (52.5) | 2.0 | .96 | n.s. |
Mean EASI Severity Indexes ± SD |  |  |  |  |  | ||
   Physical health | 2.0 ± 1.6 | 1.9 ± 1.6 | .34 | .73 | n.s. | ||
   Education, Work, Income | 2.5 ± 1.5 | 2.5 ± 1.8 | .13 | .90 | n.s. | ||
   Alcohol | 2.3 ± 1.7 | 2.2 ± 1.9 | .47 | .64 | n.s. | ||
   Drugs | 5.0 ± 1.1 | 4.6 ± 1.1 | 3.1 | .002 | < .05 | ||
   Legal | 2.4 ± 1.7 | 2.4 ± 2.0 | -.09 | .93 | n.s. | ||
   Family | 3.8 ± 1.5 | 3.6 ± 1.6 | .85 | .40 | n.s. | ||
   Psycho-emotional | 3.5 ± 1.8 | 3.4 ± 1.9 | .76 | .90 | n.s. | ||