| T1 | T2 |  |  | ||
---|---|---|---|---|---|---|
 | Mean | SD | Mean | SD | Pa | Pb |
Total sample (n = 137) | 2.08 | 0.61 | 2.01 | 0.63 | 0.219 | Â |
Age | Â | Â | Â | Â | Â | Â |
< 30 years (n = 28) | 2.12 | 0.63 | 2.00 | 0.61 | 0.371 | 0.933 |
≥ 30 years (n = 109) | 2.07 | 0.61 | 2.01 | 0.64 | 0.366 |  |
Sex | Â | Â | Â | Â | Â | Â |
Male (n = 97) | 2.03 | 0.62 | 2.03 | 0.65 | 0.996 | 0.513 |
Female (n = 40) | 2.19 | 0.58 | 1.96 | 0.58 | 0.019 | Â |
Education | Â | Â | Â | Â | Â | Â |
Only primary school (n = 59) | 2.20 | 0.62 | 2.11 | 0.61 | 0.317 | 0.150 |
More than primary school (n = 66) | 2.00 | 0.60 | 1.95 | 0.65 | 0.543 | Â |
Civil status | Â | Â | Â | Â | Â | Â |
Not married/cohabiting (n = 77) | 2.13 | 0.66 | 2.03 | 0.63 | 0.200 | 0.650 |
Married/cohabiting (n = 50) | 2.02 | 0.56 | 1.98 | 0.65 | 0.589 | Â |
Employment % | Â | Â | Â | Â | Â | Â |
Yes (n = 44) | 2.04 | 0.61 | 2.03 | 0.66 | 0.940 | 0.911 |
No (n = 83) | 2.13 | 0.62 | 2.02 | 0.62 | 0.098 | Â |
Main substance of abuse | Â | Â | Â | Â | Â | Â |
Alcohol (n = 77) | 2.04 | 0.63 | 2.04 | 0.63 | 0.930 | 0.578 |
Poly-substance abuse (n = 60) | 2.13 | 0.59 | 1.98 | 0.63 | 0.106 | Â |
Age at onset of substance use disorder | Â | Â | Â | Â | Â | Â |
≥ 18 years (n = 76) | 2.07 | 0.63 | 1.90 | 0.64 | 0.022 | 0.020 |
< 18 years (n = 61) | 2.09 | 0.58 | 2.15 | 0.59 | 0.489 | Â |
Use of substances at T2 | Â | Â | Â | Â | Â | Â |
"Abstainers" (n = 41) | 1.94 | 0.60 | 1.61 | 0.59 | 0.002 | < 0.001 |
"Relapsers" (n = 96) | 2.14 | 0.61 | 2.18 | 0.56 | 0.514 | Â |