Table 1 Demographic features of the sample at baseline stratified according to cognitive impairment
|  | Total Sample | MoCA® < 26 | WASI FSIQ | BRIEF-A GEC | |||
|---|---|---|---|---|---|---|---|
Impaired (n = 53) | Nonimpaired (n = 109) | Impaired (n = 30) | Nonimpaired (n = 133) | Impaired (n = 87) | Nonimpaired (n = 58) | ||
Age at baseline, \(\overline{x}\) (SD) | 27.6 (7.5) | 27.6 (7.8) | 27.6 (7.4) | 26.0 (8.3) | 27.9 (7.3) | 27.6 (8.3)* | 28.7 (5.6) |
Male gender, n(%) | 107 (65.2) | 35 (66.0) | 71 (65.1) | 18 (60.0) | 88 (66.1) | 60 (68.9) | 36 (62.1) |
Education at baseline, years, \(\overline{x}\) (SD) | 11.6 (1.7) | 11.6 (1.8) | 11.6 (1.7) | 11.3 (1.7) | 11.7 (1.7) | 11.5 (1.6) | 11.8 (1.8) |
Income from work or other meaningful daily activity, n(%) | 101 (61.6) | 31 (58.5) | 68 (62.4) | 16 (53.3) | 84 (63.2) | 51 (58.6) | 36 (62.1) |
Work experience, years, \(\overline{x}\) (SD)a) | 5.5 (5.8) | 6.4 (7.0) | 5.2 (5.1) | 3.9 (4.1) | 5.9 (6.1) | 5.5 (6.5) | 6.0 (4.4) |
Substance debut age, \(\overline{x}\) (SD) b) | 13.1 (2.1) | 13.0 (2.0) | 13.2 (2.1) | 12.8 (1.7) | 13.1 (2.2) | 13.0 (2.0) | 13.5 (2.4) |
Years of substance use, \(\overline{x}\) (SD) b) | 14.5 (7.5) | 15.0 (7.8) | 14.9 (7.3) | 14.9 (8.4) | 14.9 (7.3) | 14.7 (8.4) | 15.3 (5.8) |
Treatment attempts, \(\overline{x}\) (SD) | 1.6 (2.3) | 1.5 (1.7) | 1.8 (2.8) | 1.7 (2.2) | 1.7 (2.5) | 1.4 (1.9)* | 2.2 (3.1) |
Intravenous drug ever used, n(%)c) | 100 (61.3) | 31 (59.6) | 68 (62.4) | 16 (53.3) | 83 (62.9) | 54 (62.8) | 39 (67.2) |