Table 1 Baseline socio-demographic variables and mental stress scores for substance abuse patients voluntarily or involuntarily admitted to addiction treatment centers
| Â | Involuntary n/ Voluntary n | Involuntary | Voluntary | P-value |
|---|---|---|---|---|
Age, mean (SD) | 65/137 | 29 (10.6) | 31 (8.9) | 0.229 |
Females (%) | 65/137 | 31 (47.7) | 37 (27) | 0.004 |
Education | ||||
 Mean years in primary and high school (SD) | 59/130 | 10.53 (1.4) | 10.59 (1.6) | 0.783 |
 Mean years in college/university (SD) | 59/130 | 0.17 (0.8) | 0.31 (1.0) | 0.352 |
Sources of financial support a, c | ||||
 Employment (%) | 60/130 | 6 (10.0) | 24 (18.5) | 0.137 |
 Unemployment compensation (%) | 60/130 | 2 (3.3) | 4 (3.1) |  |
 Public welfare benefits (%) | 62/135 | 59 (95.2) | 115 (85.2) | 0.043 |
 Partner, family, or friends (%) | 60/130 | 17 (28.3) | 37 (28.5) | 0.985 |
 Illegal activity (%) | 60/130 | 24 (40.0) | 47 (36.2) | 0.610 |
 Prostitution (%) | 60/130 | 3 (5.0) | 1 (0.8) |  |
Living arrangement c | ||||
 With partner (%) | 60/130 | 8 (13.3) | 11 (8.5) | 0.298 |
 Alone (%) | 60/130 | 31 (51.7) | 62 (47.7) | 0.610 |
 With family (%) | 60/130 | 9 (15.0) | 26 (20.0) | 0.409 |
 Homeless (%) | 60/130 | 9 (15.0) | 16 (12.3) | 0.610 |
 Institution (%) | 60/130 | 2 (3.3) | 15 (11.5) |  |
Visits to physician for somatic complaintsc (%) | 60/130 | 24 (40.0) | 32 (24.6) | 0.031 |
Injecting illicit drugc (%) | 61/134 | 43 (70.5) | 62 (46.3) | 0.002 |
Drug overdosesd (%) | 59/130 | 41 (69.5) | 63 (48.5) | 0.007 |
Suicide attemptsd (%) | 60/131 | 23 (38.3) | 71 (54.2) | 0.042 |
Mental stress score | ||||
 SCL-90-R GSIb, mean (SD) | 62/135 | 1.04 (0.7) | 1.28 (0.7) | 0.023 |