Table 1. Demographic characteristics and offending data of young offenders.
| Variable | Training | Control |
|---|---|---|
| Age (years) | 16.08 (1.2) | 16.35 (1.2) |
| IQ | 80.89 (9.64) | 83.77 (7.64) |
| SES (mean) | 1.3 (0.62) | 1.6 (0.86) |
| Low (= 1) | 79% (19) | 65% (17) |
| Middle (= 2) | 13% (3) | 12% (3) |
| High (= 3) | 8% (2) | 23% (6) |
| YPI | 115.2 (16.5) | 125.8 (22.8) |
| CU traits | 34.2 (6.6) | 35.5 (8.4) |
| Age at first offence | 14.17 (1.7) | 13.24 (1.7) |
| Lifetime offence rate | 6.42 (6.24) | 6.92 (10.68) |
| Pretest offence rate (6m pretest) | 3.63 (4.95) | 1.92 (1.67) |
| Pretest offence most severe (6m pretest) | 3.75 (2.23) | 2.62 (1.84) |
| Pretest offence mean severity (6m pretest) | 2.92 (1.82) | 2.24 (1.53) |
| Re-offence rate (6m posttest) | 1.67 (2.58) | 0.92 (1.44) |
| Re-offence most severe (6m posttest) | 2.08 (2.28) | 1.85 (2.53) |
| Re-offence mean severity (6m posttest) | 1.76 (1.89) | 1.57 (2.11) |
Table entries show mean values (standard deviations in parentheses), or % of group (with numbers in parentheses); IQ = intelligence quotient; SES = socio-economic status; YPI = Youth Psychopathy Inventory; CU = Callous and Unemotional.