Table 2.
Means and Standard Deviation of YLS/CMI for the Nonviolent, Violent-only, and Violent-Plus Groups.
| YLS/CMI | Nonviolent (n = 2,449) | Violent Only (n = 726) | Violent Plus (n = 475) | df | F | p | Partial η2 | |
|---|---|---|---|---|---|---|---|---|
| YLS/CMI total score | M | 12.29 | 12.42 | 14.31 | (2, 3,647) | 41.63 | <.001b,c | .022 |
| SD | 4.53 | 4.13 | 4.50 | |||||
| Prior and current offenses/dispositions | M | 0.23 | 0.07 | 0.42 | (2, 3,647) | 88.57 | <.001a,b,c | .046 |
| SD | 0.46 | 0.33 | 0.56 | |||||
| Family circumstances/parenting | M | 2.29 | 2.13 | 2.48 | (2, 3,647) | 11.82 | <.001a,b,c | .006 |
| SD | 1.26 | 1.19 | 1.20 | |||||
| Education/employment | M | 2.12 | 2.03 | 2.52 | (2, 3,647) | 15.66 | <.001b,c | .009 |
| SD | 1.58 | 1.61 | 1.70 | |||||
| Peer relations | M | 3.06 | 3.36 | 3.39 | (2, 3,647) | 34.99 | <.001a,b | .019 |
| SD | 1.13 | 0.92 | 0.95 | |||||
| Substance abuse | M | 0.24 | 0.17 | 0.35 | (2, 3,647) | 11.77 | <.001a,b,c | .006 |
| SD | 0.64 | 0.48 | 0.80 | |||||
| Leisure/recreation | M | 2.26 | 2.29 | 2.42 | (2, 3,647) | 5.61 | .004b | .003 |
| SD | 0.95 | 0.92 | 0.82 | |||||
| Personality/behavior | M | 0.81 | 1.24 | 1.27 | (2, 3,647) | 70.39 | <.001a,b | .037 |
| SD | 1.05 | 1.06 | 1.09 | |||||
| Attitudes/orientation | M | 1.29 | 1.14 | 1.47 | (2, 3,647) | 17.35 | <.001a,b,c | .009 |
| SD | 0.93 | 0.85 | 1.02 | |||||
| Age at first charge | M | 15.20 | 15.27 | 14.97 | (2, 3,647) | 8.78 | <.001b,c | .005 |
| SD | 1.26 | 1.24 | 1.31 |
aSignificant difference between nonviolent and violent only. bSignificant difference between nonviolent and violent plus. cSignificant difference between violent only and violent plus.